Linux tricks

Tricks on Linux command line

cd -: back to the last working directory

Running multiple commands

• Running multiple commands in one single command

  command_1; command_2; command_3
  

• Running multiple commands in one single command only if the previous command was successful

  command_1 && command_2
  

Previous commands and arguments

!! the last command

!:n : the n of previous command argument. e.g. !:0 is the last command, and !:-1 is the first argument of last command

Alt+. the last argument of any of the previous commands.

Esc + . last argument of the last command.

!^      first argument
!$      last argument
!*      all arguments
!:2     second argument

!:2-3   second to third arguments
!:2-$   second to last arguments
!:2*    second to last arguments
!:2-    second to next to last arguments

!:0     the command
!!      repeat the previous line

Check for Spelling of Words in Linux

look docum

Linux terminal shortcuts list

1. Ctrl+a Move cursor to start of line
2. Ctrl+e Move cursor to end of line
3. Ctrl+u Cut everything before the cursor
4. Ctrl+k Cut everything after the cursor
5. Ctrl+i Clear the terminal
6. Ctrl+r Search command in history - type the search term
7. Ctrl+b Move back one character
8. Alt++b Move back one word
9. Ctrl+f Move forward one character
10. Alt++f Move forward one word
11. Ctrl+d Delete current character
12. Ctrl+w Cut the last word
13. Alt++d Cut word after the cursor
14. Alt++w Cut word before the cursor
15. Ctrl+y Paste the last deleted command
16. Ctrl+_ Undo
17. Ctrl+xx Toggle between first and current position
18. Ctrl+c Cancel the command
19. Ctrl+j End the search at current history entry
20. Ctrl+g Cancel the search and restore original line
21. Ctrl+n Next command from the History
22. Ctrl+p previous command from the History

Ref stackoverflow

Pretty view csv file in terminal

add this to .bashrc, and then just pretty_csv xxx.csv

function pretty_csv {
    column -t -s, -n "$@" | less -F -S -X -K
}

Pretty print code in paper with enscript

sudo apt install enscript
enscript -2rj --highlight=python --color=1 -o minpack.ps minpack.py

Check disk usage

sudo du -ah --max-depth=1  / | sort -hr

create crontab tasks with cron -e