47 lines
1.2 KiB
Markdown
47 lines
1.2 KiB
Markdown
# Shell-Oneliner
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Based on https://github.com/onceupon/Bash-Oneliner
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but mainly for ZSH, my personal needs and configuration.
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## Terminal Tricks
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```
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Ctrl + r : begins a backward search through command history.(keep pressing Ctrl + r to move backward)
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Ctrl + a : move to the beginning of line.
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Ctrl + e : move to the end of line.
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Ctrl + w : cut the word before the cursor; then Ctrl + y paste it
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Ctrl + u : cut the line; then Ctrl + y paste it
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Ctrl + x + Ctrl + e : launch editor defined by $EDITOR to input your command. Useful for multi-line commands.
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Esc + c : converts letter under the cursor to uppercase, rest of the word to lowercase.
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```
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### ... with my own configuration
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```
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Ctrl + t : print current date
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```
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### environment variables
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```
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$0 : name of shell or shell script.
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$1, $2, $3, ... : positional parameters.
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$# : number of positional parameters.
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$? : most recent foreground pipeline exit status.
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$- : current options set for the shell.
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$$ : pid of the current shell (not subshell).
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$! : is the PID of the most recent background command.
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$USER : current username
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$HOSTNAME : current hostname
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```
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### length of variable
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```
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var="some string"
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echo ${#var}
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# 11
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``` |