linux 如何判断当前用户

linux 中，如何判断当前用户是否是root  呢？

判断当前用户是否是root

#---------------------------- root user check ---------------------start   
if [ `id -u` -ne 0 ]; then  
    echo "Please re-run ${this_file} as root."  
    exit 1   
fi   
#---------------------------- root user check ---------------------end  
 

if [ x"$USER" = x"" ];then  
    if  id |grep "^uid=0(root)">/dev/null ;then  
        :   
    else  
        echo "Please rerun `basename $0` as root ."  
        exit 1   
    fi   
else  
    if [ ! x"$USER" = x"root" ];then  
        echo "Please rerun `basename $0` as root ."  
        exit 1   
    fi   
fi  
 

#=============== check current user start ================   
if [ ! $USER = root  ];then  
    echo "Please rerun this script as root ."  
    exit 1   
fi   
#=============== check current user end ================  
 

#!/bin/sh   
if  id |grep "^uid=0(root)">/dev/null ;then  
    echo is  root   
else  
    echo not  root   
fi   
 

check_user(){   
    if [ $UID -ne 0 ];then  
        echo "Current user is not ROOT."  
        echo "Please rerun the installer as Root user."  
        exit 11   
    fi   
}    

 

 

 

 

评论

2 楼 hw1287789687 2012-11-30  

string2020 写道

如何在linux下列出当前系统下的所有用户，就像windows下的net user一样

awk -F":" '{print $1}' /etc/passwd
上述语句是列出所有的用户。

如果要列出创建的用户（id >=500） :
awk -F":" '($3>=500 && $3<65534){print $1}' /etc/passwd
示例：
[root@localhost ~]# awk -F":" '($3>=500 && $3<65534){print $1}' /etc/passwd
whuang
oracle
kingbase
xrxiong
huangwei
kingbase2
user2
nagios
abca
abc
user1

1 楼 string2020 2012-11-29  

如何在linux下列出当前系统下的所有用户，就像windows下的net user一样