"리눅스 readonly"의 두 판 사이의 차이

2020년 11월 2일 (월) 02:40 기준 최신판

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

@@ 3번째 줄: / 3번째 줄: @@
 * 읽기전용 변수 등록/출력 리눅스 명령어
-<source lang='cli'>
+<syntaxhighlight lang='console'>
-[root@jmnote ~]# readonly
+root@zetawiki:~# readonly
-declare -r BASHOPTS="checkwinsize:cmdhist:expand_aliases:extquote:force_fignore:hostcomplete:interactive_comments:login_shell:progcomp:promptvars:sourcepath"
+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 -ir BASHPID
-declare -ar BASH_VERSINFO='([0]="4" [1]="1" [2]="2" [3]="1" [4]="release" [5]="x86_64-redhat-linux-gnu")'
+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="2277"
+declare -ir PPID="3508"
 declare -r SHELLOPTS="braceexpand:emacs:hashall:histexpand:history:interactive-comments:monitor"
 declare -ir UID="0"
-</source>
+</syntaxhighlight>
-<source lang='cli'>
-[root@jmnote ~]# readonly PI=3.14
+==등록 실습==
-[root@jmnote ~]# readonly | grep PI=
+<syntaxhighlight lang='console'>
+root@zetawiki:~# echo $PI
+root@zetawiki:~# readonly PI=3.14
+root@zetawiki:~# echo $PI
+.14
+root@zetawiki:~# PI=1
+-bash: PI: readonly variable
+root@zetawiki:~# readonly | grep PI=
 declare -r PI="3.14"
-</source>
+</syntaxhighlight>
 ==같이 보기==
@@ 23번째 줄: / 32번째 줄: @@
 *[[$PPID]]
 *[[bash 버전 확인]]
+*[[$SHELLOPTS]]
-==참고 자료==
+==참고==
 *http://bash.cyberciti.biz/guide/Readonly_command
 [[분류: Bash 빌트인]]