18 Commands That Will Change The Way You Use Linux Forever - YouTube
1. `cd -` : back to the last directory we've been to.
2. `ctrl+l`: clear screen
3. `reset`: clear on steroids - resets terminal session
4. `pushd /var` + few other `cd` commands + `popd`: commands that allow you to work with directory stack and change the current working directory
5. `vim /etc/ssh/sshd_config` + ctrl+fz : isn't closing, but minimizing the window to the back ground
`fg` : bring back the window to the front.
6. `apt update`: would fail - cuz we fogot sudo
`sudo !!` : would run the last command as sudo
7.
8. run command that already been run - `history`, choose a number of command
and run it `!102` -> the 102 command from the history would run again
9.HISTTIMEFORMAT="%Y-%m-%d %T"
`history` would should the history commands by the format.
another way to add the format, is add it to the `~/.bashrc` file with `vim` or `nano` commands.
10.cmatrix -> let you look cool + ctrl c to escape
11.adjust font `shift +` or `shift -`, `reset` command would reset the font size
12. `ctrl a` - start of the line
`ctrl e` - end of the line
13.chainning commands -> `ls -l; echo "hello" `
or -> `ls -l && echo "hello" `
&& - would stop when meets an error
; - would pop up an error and keep on running the second/next command
14. `tail` / `head` commands to see top or bottom of a file.
15. truncate (be cautious while using this one - its risky)
it allows to change the size of a very large files (like log files)
for example `truncate -s <size_of_file> <name_of_file>` == truncate -s 0 hello.txt to empty the hello.txt file
16. `mount | column -t` : make sure all the output shows in columns
any verbose and messy command output would look better using `| column -t`
