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                # 組/用戶是否存在 ## 用戶是否存在 ``` user="root" # 如果用戶不存在就添加 egrep "^$user" /etc/passwd >& /dev/null if [ $? -ne 0 ] then useradd $user fi ``` ## 用戶組是否存在 ``` group="git" # 如果用戶組不存在就添加 egrep "^$group" /etc/group >& /dev/null if [ $? -ne 0 ] then groupadd $group fi ``` # 當前用戶是否為root ## whoami ``` if [ `whoami` = "root" ];then echo "root用戶!" else echo "非root用戶!" fi ``` ## id -u ``` if [ `id -u` -eq 0 ];then echo "root用戶!" else echo "非root用戶!" fi ```
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