리눅스 readonly

1 개요[ | ]

리눅스 readonly

읽기전용 변수 등록/출력 리눅스 명령어

root@zetawiki:~# readonly
declare -r BASHOPTS="checkwinsize:cmdhist:complete_fullquote:expand_aliases:extglob:extquote:force_fignore:histappend:interactive_comments:login_shell:progcomp:promptvars:syntaxhighlightpath"
declare -ir BASHPID
declare -r BASH_COMPLETION_COMPAT_DIR="/etc/bash_completion.d"
declare -ar BASH_VERSINFO='([0]="4" [1]="3" [2]="11" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")'
declare -ir EUID="0"
declare -ir PPID="3508"
declare -r SHELLOPTS="braceexpand:emacs:hashall:histexpand:history:interactive-comments:monitor"
declare -ir UID="0"

2 등록 실습[ | ]

root@zetawiki:~# echo $PI

root@zetawiki:~# readonly PI=3.14
root@zetawiki:~# echo $PI
3.14
root@zetawiki:~# PI=1
-bash: PI: readonly variable
root@zetawiki:~# readonly | grep PI=
declare -r PI="3.14"

3 같이 보기[ | ]

4 참고[ | ]

http://bash.cyberciti.biz/guide/Readonly_command