Bash-Beginners-Guide

export var export VAR=value
${nnnn}
export
var=val
${nn}
"$@" "$@" "$@"
setenv var
val
$# $# $# $#argv
$? $? $? $status
$! $! $!
Set environment
variable
More than 9
arguments can
be referenced
All arguments as
separate words
Number of
arguments
Exit status of the
most recently
executed
command
PID of most
recently
backgrounded
process
$- $- $- Current options
. file source file or . file . file source file
alias x='y' alias x=y alias x y
case case case
done done done end
switch or
case
esac esac esac endsw
Read commands
in file
Name x stands
for command y
Choose
alternatives
End a loop
statement
End case or
switch
exit n exit n exit n exit (expr) Exit with a status
for/do for/do for/do foreach
set -f, set -o
nullglob|dotglob|nocaseglob|noglob
noglob
hash hash alias -t hashstat
hash cmds hash cmds
Bash Guide for Beginners
alias -t
cmds
rehash
hash -r hash -r unhash
history history history
Loop through
variables
Ignore
substitution
characters for
filename
generation
Display hashed
commands
(tracked aliases)
Remember
command
locations
Forget command
locations
List previous
commands
Appendix A. Shell Features 144