fix: Add syntax highlighting to code blocks

This commit is contained in:
Asocia 2021-12-08 16:31:46 +03:00
parent 871f28d44c
commit 089e6ebae8
41 changed files with 92 additions and 87 deletions

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You can use `touch` to change modification date or time of a file: You can use `touch` to change modification date or time of a file:
``` ```bash
touch -d 20210703 filename touch -d 20210703 filename
# Set the times on a file to a specific date and time: # Set the times on a file to a specific date and time:
@ -7,8 +7,8 @@ touch -t YYYYMMDDHHMM.SS filename
``` ```
or use the times from a file to set the times on a second file: ... or use the times from a file to set the times on a second file:
``` ```bash
touch -r filename filename2 touch -r filename filename2
``` ```

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You can get the size of a file in bytes with: You can get the size of a file in bytes with:
``` ```bash
stat -c %s file_name stat -c %s file_name
# example # example
size=$(stat -c %s $myfile) size=$(stat -c %s $myfile)

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You can loop through the files with: You can loop through the files with:
``` ```bash
for f in * ; do for f in * ; do
echo $f echo $f
done done
``` ```
If you want to loop through only directories: If you want to loop through only directories:
``` ```bash
for d in */ ; do for d in */ ; do
echo $d echo $d
done done

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You can move every file (except the hidden ones) up by one level in the hierarchy with something like this: You can move every file (except the hidden ones) up by one level in the hierarchy with something like this:
``` ```bash
for d in */ ; do for d in */ ; do
mv $d* . mv $d* .
rmdir $d # optional rmdir $d # optional

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1. Redirect stdout to one file and stderr to another file: 1. Redirect stdout to one file and stderr to another file:
```bash
command > out 2>error command > out 2>error
```
2. Redirect stdout to a file `out`, and then redirect stderr to stdout: 2. Redirect stdout to a file `out`, and then redirect stderr to stdout:
```bash
command > out 2>&1 command > out 2>&1
```

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You can split a string with `cut`: You can split a string with `cut`:
``` ```bash
foo="hello-world-bye-world" foo="hello-world-bye-world"
bar=$(echo $foo | cut -d"-" -f2) bar=$(echo $foo | cut -d"-" -f2)
echo $bar echo $bar

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I have lots of images of a scene from sunrise to sunset and my wallpaper is automaticatilly set to one of them based on the hour of the day. But you know what? I LOVE customizing my machine and I WANT MORE! I want the transition to be smooth af. To make this possible I need to generate images. And here is the result of literally 5 minutes of google search: I have lots of images of a scene from sunrise to sunset and my wallpaper is automatically set to one of them based on the hour of the day. But you know what? I LOVE customizing my machine and I WANT MORE! I want the transition to be smooth af. To make this possible I need to generate images. And here is the result of literally 5 minutes of google search:
``` ```bash
convert A.jpg B.jpg -morph 10 out.jpg convert A.jpg B.jpg -morph 10 out.jpg
``` ```

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Most of the time, `xev` will be enough to know exactly which key is pressed but it generates a lot of output and sometimes that is overwhelming. If you find yourself in this situation try: Most of the time, `xev` will be enough to know exactly which key is pressed but it generates a lot of output and sometimes that is overwhelming. If you find yourself in this situation try:
``` ```bash
showkey -a showkey -a
``` ```

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You can join multiple images into one using `convert`: You can join multiple images into one using `convert`:
```bash
# join vertically # join vertically
convert in1.png in2.png -append out.png convert in1.png in2.png -append out.png
# join horizontally # join horizontally
convert in1.png in2.png +append out.png convert in1.png in2.png +append out.png
```

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You can join multiple images to pdf using `convert`: You can join multiple images to pdf using `convert`:
```bash
convert *.png out.pdf convert *.png out.pdf
```
If you get an error like If you get an error like
```
convert-im6.q16: attempt to perform an operation not allowed by the security policy `PDF' @ error/constitute.c/IsCoderAuthorized/408. convert-im6.q16: attempt to perform an operation not allowed by the security policy `PDF' @ error/constitute.c/IsCoderAuthorized/408.
```
follow the steps below: follow the steps below:
```bash
sudo vim /etc/ImageMagick-6/policy.xml sudo vim /etc/ImageMagick-6/policy.xml
```
and replace the line and replace the line
```xml
<policy domain="coder" rights="none" pattern="PDF" /> <policy domain="coder" rights="none" pattern="PDF" />
```
with with
```xml
<policy domain="coder" rights="read|write" pattern="PDF" /> <policy domain="coder" rights="read|write" pattern="PDF" />
```
[source](https://askubuntu.com/questions/1081895/trouble-with-batch-conversion-of-png-to-pdf-using-convert) [source](https://askubuntu.com/questions/1081895/trouble-with-batch-conversion-of-png-to-pdf-using-convert)

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You can join multiple pdf files into one using this command: You can join multiple pdf files into one using this command:
``` ```bash
pdfunite in-1.pdf in-2.pdf in-n.pdf out.pdf pdfunite in-1.pdf in-2.pdf in-n.pdf out.pdf
``` ```

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You can extract certain parts of a pdf file with this: You can extract certain parts of a pdf file with this:
``` ```bash
pdfjam original.pdf 5-10 -o out.pdf pdfjam original.pdf 5-10 -o out.pdf
``` ```

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You can use below command to create a virtual environment which contains installed packages: You can use below command to create a virtual environment which contains installed packages:
``` ```bash
virtualenv venv --system-site-packages virtualenv venv --system-site-packages
``` ```

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``` ```bash
readlink -f /path/to/file readlink -f /path/to/file
``` ```

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``` ```bash
psql dbname username psql dbname username
# example # example

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If you have an existing repository and want to add a new remote you can use this command: If you have an existing repository and want to add a new remote you can use this command:
``` ```bash
git remote add <name> <url> git remote add <name> <url>
``` ```
Example: Example:
``` ```bash
git remote add origin git@github.com:Asocia/til.git git remote add origin git@github.com:Asocia/til.git
git push -u origin my_branch git push -u origin my_branch
``` ```

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You can change author of your commits to anyone. Let's make all the commit's of the current repository Torvalds :D Luckily we know his email address so this will be very easy. Just run: You can change author of your commits to anyone. Let's make all the commits of the current repository Torvalds's :D Luckily we know his email address so this will be very easy. Just run:
``` ```bash
git filter-branch --env-filter ' git filter-branch --env-filter '
OLD_EMAIL="akkayas17@itu.edu.tr" OLD_EMAIL="old_email@domain.com"
CORRECT_NAME="Linus Torvals" CORRECT_NAME="Linus Torvals"
CORRECT_EMAIL="torvalds@linux-foundation.org" CORRECT_EMAIL="torvalds@linux-foundation.org"
if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ] if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]

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You have a commit which contains a good code change but it is in another branch? You have a commit which contains a good code change but it is in another branch?
``` ```bash
# pick the commit # pick the commit
git cherry-pick <sha> git cherry-pick <sha>

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@ -4,18 +4,18 @@ I'm reading Pro Git book and I learn some cool stuff. I don't know if I'm going
If you to know which changes are made since some time, use `--since` option like: If you to know which changes are made since some time, use `--since` option like:
``` ```bash
git log --since=2.weeks git log --since=2.weeks
``` ```
or until some time or until some time
``` ```bash
git log --until="20-01-2020" git log --until="20-01-2020"
``` ```
These commands works with lots of formats, you can specify a specific date like "2008-01-15", or a relative date such as "2 years 1 day 3 minutes ago" These commands works with lots of formats, you can specify a specific date like "2008-01-15", or a relative date such as "2 years 1 day 3 minutes ago"
The --author option allows you to filter on a specific author The --author option allows you to filter on a specific author
``` ```bash
git log --author="Asocia" git log --author="Asocia"
``` ```
@ -23,7 +23,7 @@ git log --author="Asocia"
Another really helpful filter is the -S option (colloquially referred to as Gits “pickaxe” option), which takes a string and shows only those commits that changed the number of occurrences of that string. For instance, if you wanted to find the last commit that added or removed a reference to a specific function, you could call: Another really helpful filter is the -S option (colloquially referred to as Gits “pickaxe” option), which takes a string and shows only those commits that changed the number of occurrences of that string. For instance, if you wanted to find the last commit that added or removed a reference to a specific function, you could call:
``` ```bash
git log -S function_name git log -S function_name
``` ```
@ -33,11 +33,11 @@ git log -S function_name
Weve mentioned and given some demonstrations of how the git clone command implicitly adds the origin remote for you. Heres how to add a new remote explicitly. To add a new remote Git repository as a shortname you can reference easily, run git remote add <shortname> <url>: Weve mentioned and given some demonstrations of how the git clone command implicitly adds the origin remote for you. Heres how to add a new remote explicitly. To add a new remote Git repository as a shortname you can reference easily, run git remote add <shortname> <url>:
``` ```bash
$ git remote -v git remote -v
$ git remote add pb https://github.com/paulboone/ticgit git remote add pb https://github.com/paulboone/ticgit
$ git remote -v git remote -v
$ git fetch pb git fetch pb
``` ```
Pauls master branch is now accessible locally as pb/master — you can merge it into one of your branches, or you can check out a local branch at that point if you want to inspect it. Pauls master branch is now accessible locally as pb/master — you can merge it into one of your branches, or you can check out a local branch at that point if you want to inspect it.
@ -52,23 +52,23 @@ From Git version 2.23 onwards you can use `git switch` instead of `git checkout`
- Renaming branches - Renaming branches
Suppose you have a branch that is called `bad-branch-name` and you want to change it to `corrected-branch-name`, while keeping all history. You also want to change the branch name on the remote (GitHub, GitLab, other server). How do you do this? Rename the branch locally with the `git branch --move` command: Suppose you have a branch that is called `bad-branch-name` and you want to change it to `corrected-branch-name`, while keeping all history. You also want to change the branch name on the remote (GitHub, GitLab, other server). How do you do this? Rename the branch locally with the `git branch --move` command:
``` ```bash
git branch --move bad-branch-name corrected-branch-name git branch --move bad-branch-name corrected-branch-name
``` ```
This replaces your `bad-branch-name` with `corrected-branch-name`, but this change is only local for now. To let others see the corrected branch on the remote, push it: This replaces your `bad-branch-name` with `corrected-branch-name`, but this change is only local for now. To let others see the corrected branch on the remote, push it:
``` ```bash
git push --set-upstream origin corrected-branch-name git push --set-upstream origin corrected-branch-name
``` ```
To delete the old branch name: To delete the old branch name:
``` ```bash
git push origin --delete bad-branch-name git push origin --delete bad-branch-name
``` ```
- Pushing a local branch into a remote branch that is named differently - Pushing a local branch into a remote branch that is named differently
``` ```bash
# our branch is serverfix and we don't want to push it with this name # our branch is serverfix and we don't want to push it with this name
git push origin serverfix:awesomebranch git push origin serverfix:awesomebranch
``` ```

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Let's say you are in `wip` branch and you didn't push your changes to server yet. If you want to get all the changes from master: Let's say you are in `wip` branch and you didn't push your changes to server yet. If you want to get all the changes from master:
``` ```bash
git checkout master git checkout master
git pull git pull
git checkout wip git checkout wip

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When you do When you do
``` ```bash
git rebase -i commitish git rebase -i commitish
``` ```
and edit some commits, you will recreate the history hence all the commits coming after edited one will have the same date and time. If you don't want this behaviour here is the trick: and edit some commits, you will recreate the history hence all the commits coming after edited one will have the same date and time. If you don't want this behaviour here is the trick:
``` ```bash
git rebase --committer-date-is-author-date -i commitish git rebase --committer-date-is-author-date -i commitish
``` ```
Note that you need git version 23.19 or greater to do this in interactive mode. Note that you need git version 23.19 or greater to do this in interactive mode.

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From Pro Git book: From Pro Git book:
> Another useful thing you may want to do is to keep the file in your working tree but remove it from your staging area. In other words, you may want to keep the file on your hard drive but not have Git track it anymore. This is particularly useful if you forgot to add something to your .gitignore file and accidentally staged it, like a large log file or a bunch of .a compiled files. To do this, use the --cached option: > Another useful thing you may want to do is to keep the file in your working tree but remove it from your staging area. In other words, you may want to keep the file on your hard drive but not have Git track it anymore. This is particularly useful if you forgot to add something to your .gitignore file and accidentally staged it, like a large log file or a bunch of .a compiled files. To do this, use the --cached option:
``` ```bash
git rm --cached README git rm --cached README
``` ```

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You can remove untracked files with `git-clean`. You can remove untracked files with `git-clean`.
``` ```bash
# Show which files will be removed # Show which files will be removed
git clean -nd git clean -nd

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You can clone a repository with ssh and pull/push without having to enter your credentials. If you already cloned it with https and want to change your remote url, do this: You can clone a repository with ssh and pull/push without having to enter your credentials. If you already cloned it with https and want to change your remote url, do this:
``` ```bash
git remote -v git remote -v
origin https://github.com/Asocia/dotfiles.git (fetch) origin https://github.com/Asocia/dotfiles.git (fetch)
origin https://github.com/Asocia/dotfiles.git (push) origin https://github.com/Asocia/dotfiles.git (push)

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To see the changes in both staging area and working tree, use: To see the changes in both staging area and working tree, use:
``` ```bash
git diff HEAD git diff HEAD
``` ```

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You can add filename to `git log` to view all the commit history of a file: You can add filename to `git log` to view all the commit history of a file:
``` ```bash
git log my_file git log my_file
``` ```
If you want to view diff's, add `-p` option: If you want to view diff's, add `-p` option:
``` ```bash
git log -p my_file git log -p my_file
``` ```
If you want to continue listing the file history beyond renames, add `--follow` option: If you want to continue listing the file history beyond renames, add `--follow` option:
``` ```bash
git log --follow -p my_file git log --follow -p my_file
``` ```

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You can generate authentication keys and use it with ssh to login. First run the below command if you don't have any (it won't overwrite if you already have one): You can generate authentication keys and use it with ssh to login. First run the below command if you don't have any (it won't overwrite if you already have one):
``` ```bash
ssh-keygen ssh-keygen
``` ```
Then copy your public key to remote server with this: Then copy your public key to remote server with this:
``` ```bash
ssh-copy-id name@host ssh-copy-id name@host
``` ```

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YOU CAN TOGGLE CAPS LOCK FROM COMMAND LINE BY DOING: YOU CAN TOGGLE CAPS LOCK FROM COMMAND LINE BY DOING:
``` ```bash
xdotool key Caps_Lock xdotool key Caps_Lock
``` ```

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@ -5,13 +5,13 @@ Read [this](https://wiki.archlinux.org/title/backlight) and you are done :D
Here is the tl;dr part. Here is the tl;dr part.
Run `ls /sys/class/backlight/` to see which graphics card is managing your backlight. I'm assuming you get an ouput like `intel_backlight`. Then run this: Run `ls /sys/class/backlight/` to see which graphics card is managing your backlight. I'm assuming you get an ouput like `intel_backlight`. Then run this:
``` ```bash
ls /sys/class/backlight/intel_backlight ls /sys/class/backlight/intel_backlight
actual_brightness bl_power brightness device/ actual_brightness bl_power brightness device/
max_brightness power/ scale subsystem/ type uevent max_brightness power/ scale subsystem/ type uevent
``` ```
Read the `max_brightness` value and then set your brightness to something smaller than that value: Read the `max_brightness` value and then set your brightness to something smaller than that value:
``` ```bash
cat /sys/class/backlight/intel_backlight/max_brightness cat /sys/class/backlight/intel_backlight/max_brightness
echo 100 > /sys/class/backlight/intel_backlight/brightness echo 100 > /sys/class/backlight/intel_backlight/brightness
``` ```
@ -23,7 +23,7 @@ RUN+="/bin/chgrp video /sys/class/backlight/intel_backlight/brightness"
RUN+="/bin/chmod g+w /sys/class/backlight/intel_backlight/brightness" RUN+="/bin/chmod g+w /sys/class/backlight/intel_backlight/brightness"
``` ```
and add yourself to the `video` group. and add yourself to the `video` group.
``` ```bash
sudo usermod -aG video $USER sudo usermod -aG video $USER
``` ```

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If you want to connect to a device via bluetooth: If you want to connect to a device via bluetooth:
``` ```bash
sudo systemctl enable bluetooth.service sudo systemctl enable bluetooth.service
bluetoothctl power on bluetoothctl power on
bluetoothctl devices # to find the mac address of your device bluetoothctl devices # to find the mac address of your device

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@ -7,7 +7,7 @@ N: See apt-secure(8) manpage for repository creation and user configuration deta
You will need to find corresponding file in `sources.list.d` and delete it. You will need to find corresponding file in `sources.list.d` and delete it.
``` ```bash
cd /etc/apt/sources.list.d cd /etc/apt/sources.list.d
sudo rm bad-repo.list sudo rm bad-repo.list
``` ```

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@ -18,11 +18,11 @@ While this is effective it certainly isnt copy-paste drop dead simple and is
## Doing it the X11 config way ## Doing it the X11 config way
X11 provides configurations in a directory “X11/xorg.conf.d/” this directory could live in various places on your system depending on your distribution. However, X11 will always attempt to also load configurations from /etc/X11/xorg.conf.d/ when present. To ensure the directory exists, run: X11 provides configurations in a directory “X11/xorg.conf.d/” this directory could live in various places on your system depending on your distribution. However, X11 will always attempt to also load configurations from /etc/X11/xorg.conf.d/ when present. To ensure the directory exists, run:
``` ```bash
sudo mkdir -p /etc/X11/xorg.conf.d sudo mkdir -p /etc/X11/xorg.conf.d
``` ```
Next well create a new file “90-touchpad.conf”. The configuration file names end with .conf and are read in ASCII order—by convention file names begin with two digits followed by a dash. Next well create a new file “90-touchpad.conf”. The configuration file names end with .conf and are read in ASCII order—by convention file names begin with two digits followed by a dash.
``` ```bash
sudo touch /etc/X11/xorg.conf.d/90-touchpad.conf sudo touch /etc/X11/xorg.conf.d/90-touchpad.conf
``` ```
Now open up the file your editor of choice (with suitable write permission of course) and paste the following: Now open up the file your editor of choice (with suitable write permission of course) and paste the following:

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@ -4,7 +4,7 @@ Here is how it should be done:
If you want to remap it for X server, add the following line to your `~/.xsession` or `~/.xinitrc`. Make sure to add it before `exec whatever_window_manager` you are using: If you want to remap it for X server, add the following line to your `~/.xsession` or `~/.xinitrc`. Make sure to add it before `exec whatever_window_manager` you are using:
``` ```bash
setxkbmap -option 'caps:ctrl_modifier' setxkbmap -option 'caps:ctrl_modifier'
``` ```
[source](https://superuser.com/questions/566871/how-to-map-the-caps-lock-key-to-escape-key-in-arch-linux) [source](https://superuser.com/questions/566871/how-to-map-the-caps-lock-key-to-escape-key-in-arch-linux)

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Recently, I switched to dvorak layout and I am using it everywhere to get used to it. This was the command that worked everywhere (including the login screen): Recently, I switched to dvorak layout and I am using it everywhere to get used to it. This was the command that worked everywhere (including the login screen):
``` ```bash
localectl --no-convert set-x11-keymap us pc105 dvp caps:ctrl_modifier localectl --no-convert set-x11-keymap us pc105 dvp caps:ctrl_modifier
``` ```

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@ -3,7 +3,7 @@ When my Ctrl key broken, I remapped Capslock to Ctrl as it was the most useless
I am a vim user and I don't use Capslock other than typing some constant variable names or SQL syntax etc. They are all happening in vim, specifically, in insert mode. Whenever I switch to normal mode, I want my Capslock to be off. I sometimes forget and instead of moving down with `j`, I find myself `J`oining lines. This happened more than 3 times so it is time to do something. I am a vim user and I don't use Capslock other than typing some constant variable names or SQL syntax etc. They are all happening in vim, specifically, in insert mode. Whenever I switch to normal mode, I want my Capslock to be off. I sometimes forget and instead of moving down with `j`, I find myself `J`oining lines. This happened more than 3 times so it is time to do something.
I could solve this problem in keyboard level because I have a programmable keyboard. I didn't want to this because sometimes I use my laptop's keyboard and I don't want them to behave differently. So I solved it on OS level. Here are the commands that I run in order to achieve this effect: I could solve this problem in keyboard level because I have a programmable keyboard. I didn't want to this because sometimes I use my laptop's keyboard and I don't want them to behave differently. So I solved it on OS level. Here are the commands that I run in order to achieve this effect:
``` ```bash
mkdir -p ~/.xkb/keymap/ mkdir -p ~/.xkb/keymap/
mkdir -p ~/.xkb/symbols/ mkdir -p ~/.xkb/symbols/
vim ~/.xkb/symbols/mysymbols vim ~/.xkb/symbols/mysymbols

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@ -1,5 +1,5 @@
Make sure that you are not inside the mounted path. Make sure that you are not inside the mounted path.
`````` ```bash
sudo umount /path/to/dev sudo umount /path/to/dev
`````` ```

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@ -1,5 +1,5 @@
Today I wanted to ssh into my desktop from my laptop. They were both connected to my phone. Laptop was connected via Wi-Fi and the desktop was connected via USB tethering. Since they are not connected in the same way, they were on different networks and it was not possible to ssh into the other computer. I searched about the problem and found [this article](https://www.systutorials.com/port-forwarding-using-iptables/). Since my phone was rooted, I could run any command I want. The final set of commands which allowed me to ssh between each computers were: Today I wanted to ssh into my desktop from my laptop. They were both connected to my phone. Laptop was connected via Wi-Fi and the desktop was connected via USB tethering. Since they are not connected in the same way, they were on different networks and it was not possible to ssh into the other computer. I searched about the problem and found [this article](https://www.systutorials.com/port-forwarding-using-iptables/). Since my phone was rooted, I could run any command I want. The final set of commands which allowed me to ssh between each computers were:
``` ```bash
# from laptop to desktop # from laptop to desktop
iptables -t nat -A POSTROUTING ! -d 192.168.43.0/24 -o rndis0 -j MASQUERADE iptables -t nat -A POSTROUTING ! -d 192.168.43.0/24 -o rndis0 -j MASQUERADE
iptables -A PREROUTING -t nat -i swlan0 -p tcp --dport 22 -j DNAT --to 192.168.42.17:22 iptables -A PREROUTING -t nat -i swlan0 -p tcp --dport 22 -j DNAT --to 192.168.42.17:22

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You can execute vim commands in terminal by prefixing your commands with `+` symbol: You can execute vim commands in terminal by prefixing your commands with `+` symbol:
``` ```bash
vim filename +/searchterm vim filename +/searchterm
vim +PlugInstall vim +PlugInstall
vim filename +g/foo/d vim filename +g/foo/d

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@ -1,5 +1,5 @@
Typically files ending with a ~ are backups created by editors like emacs, nano or vi. Set `backupdir` to some other location if you don't want to see them everywhere. Typically files ending with a ~ are backups created by editors like emacs, nano or vi. Set `backupdir` to some other location if you don't want to see them everywhere.
``` ```vim
set backupdir=/path/to/somewhere set backupdir=/path/to/somewhere
``` ```

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You can search through multiple files using `vimgrep` command. You can search through multiple files using `vimgrep` command.
``` ```vim
# search for string all python files in the current dir # search for string all python files in the current dir
:vimgrep string *.py :vimgrep string *.py
# search for string all python files in the current dir and subdir of the current dir # search for string all python files in the current dir and subdir of the current dir

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The global command `:g[lobal]` is very powerful. It is used to execute a command matching a pattern. The syntax is The global command `:g[lobal]` is very powerful. It is used to execute a command matching a pattern. The syntax is
``` ```vim
:[range]g/pattern/cmd :[range]g/pattern/cmd
``` ```