CLI
Resources
- CommandLineFu
- CLI MacOS
- Zsh: Documentation on zsh.
- How to use RipGrep
- RegEx ripgrep
- Generate ssh key with:
ssh-keygen -t rsa -b 4096
PyPI
Upload to [pypi]
or [testpypi]
.
Environment
- Get all environment variables with
printenv
. - Use
env
display all exported environment variables or run a program in a modified environment. - Use
set
to list the name and value of each shell variable.
Commonly used linux variables
We use the printf
command/echo command to display values of the shell varible in Linux.
System Variable | Meaning | To view variable value type |
---|---|---|
BASHVERSION | Holds the version of this instance of bash. | echo $BASHVERSION |
HOSTNAME | The name of the your computer. | echo $HOSTNAME |
CDPATH | The search path for the cd command. | echo $CDPATH |
HISTFILE | The name of the file in which command history is saved. | echo $HISTFILE |
HISTFILESIZE | The maximum number of lines contained in the history file. | echo $HISTFILESIZE |
HISTSIZE | The number of commands to remember in the command history. The default value is 500. | echo $HISTSIZE |
HOME | The home directory of the current user. | echo $HOME |
IFS | The Internal Field Separator that is used for word splitting after expansion and to split lines into words with the read builtin command. The default value is <space><tab><newline>. | echo $IFS |
LANG | Used to determine the locale category for any category not specifically selected with a variable starting with LC_. | echo $LANG |
PATH | The search path for commands. It is a colon-separated list of directories in which the shell looks for commands. | echo $PATH |
PS1 | Your prompt settings. | echo $PS1 |
TMOUT | The default timeout for the read builtin command. Also in an interactive shell, the value is interpreted as the number of seconds to wait for input after issuing the command. If not input provided it will logou user. | echo $TMOUT |
TERM | Your login terminal type. | echo $TERM export TERM=vt100 |
SHELL | Set path to login shell. | echo $SHELL |
DISPLAY | Set X display name | echo $DISPLAY export DISPLAY=:0.1 |
EDITOR | Set name of default text editor. | export EDITOR=/usr/bin/vim |