linux中建立使用者、設定密碼、徹底刪除使用者
阿新 • • 發佈：2022-04-01
1、檢視系統中當前的所有使用者
[root@centos7pc1 test2]# grep bash /etc/passwd root:x:0:0:root:/root:/bin/bash liujiaxin01:x:1000:1000:liujiaxin01:/home/liujiaxin01:/bin/bash
2、使用useradd命令建立使用者
[root@centos7pc1 test2]# grep bash /etc/passwd root:x:0:0:root:/root:/bin/bash liujiaxin01:x:1000:1000:liujiaxin01:/home/liujiaxin01:/bin/bash [root@centos7pc1 test2]# useradd liujiaxin02 ## 建立使用者[root@centos7pc1 test2]# grep bash /etc/passwd ## 檢視建立結果 root:x:0:0:root:/root:/bin/bash liujiaxin01:x:1000:1000:liujiaxin01:/home/liujiaxin01:/bin/bash liujiaxin02:x:1001:1001::/home/liujiaxin02:/bin/bash
3、為新建立使用者設定密碼
新使用者並沒有密碼：
[root@centos7pc1 test2]# tail /etc/shadow nfsnobody:!!:19082:::::: gnome-initial-setup:!!:19082:::::: pcp:!!:19082:::::: sshd:!!:19082:::::: avahi:!!:19082:::::: postfix:!!:19082:::::: oprofile:!!:19082:::::: tcpdump:!!:19082:::::: liujiaxin01:$6$tjWzJEGq3eeY3CdZ$hJW0oB4X.hmJFW42SOCGxRXA8SdNRXLRwdnBPI/tPyphyT1CYXFbxEh7u.GPmNp2s3IHMSaut4DSXjutMqL/31::0:99999:7::: liujiaxin02:!!:19083:0:99999:7::: ## 新使用者並沒有密碼
使用passwd命令為新使用者建立密碼：
[root@centos7pc1 test2]# passwd liujiaxin02 ## 為新使用者建立密碼， 需要兩次確認 Changing password for user liujiaxin02. New password: Retype new password: passwd: all authentication tokens updated successfully.
檢視建立密碼結果：
[root@centos7pc1 test2]# tail /etc/shadow nfsnobody:!!:19082:::::: gnome-initial-setup:!!:19082:::::: pcp:!!:19082:::::: sshd:!!:19082:::::: avahi:!!:19082:::::: postfix:!!:19082:::::: oprofile:!!:19082:::::: tcpdump:!!:19082:::::: liujiaxin01:$6$tjWzJEGq3eeY3CdZ$hJW0oB4X.hmJFW42SOCGxRXA8SdNRXLRwdnBPI/tPyphyT1CYXFbxEh7u.GPmNp2s3IHMSaut4DSXjutMqL/31::0:99999:7::: liujiaxin02:$6$uU6mKOlv$Lyy0XjagGHyTHLClqKoIx4b/RYooUkfbujr6A/nSwQrOHCCSCyQmYiXlTsuReGNhWAgpCk9P/7cO.OD2ZFnXY/:19083:0:99999:7:::
4、徹底刪除使用者
檢視使用者及密碼：
[root@centos7pc1 test2]# tail /etc/passwd nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin gnome-initial-setup:x:988:982::/run/gnome-initial-setup/:/sbin/nologin pcp:x:987:981:Performance Co-Pilot:/var/lib/pcp:/sbin/nologin sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin avahi:x:70:70:Avahi mDNS/DNS-SD Stack:/var/run/avahi-daemon:/sbin/nologin postfix:x:89:89::/var/spool/postfix:/sbin/nologin oprofile:x:16:16:Special user account to be used by OProfile:/var/lib/oprofile:/sbin/nologin tcpdump:x:72:72::/:/sbin/nologin liujiaxin01:x:1000:1000:liujiaxin01:/home/liujiaxin01:/bin/bash liujiaxin02:x:1001:1001::/home/liujiaxin02:/bin/bash [root@centos7pc1 test2]# tail /etc/shadow nfsnobody:!!:19082:::::: gnome-initial-setup:!!:19082:::::: pcp:!!:19082:::::: sshd:!!:19082:::::: avahi:!!:19082:::::: postfix:!!:19082:::::: oprofile:!!:19082:::::: tcpdump:!!:19082:::::: liujiaxin01:$6$tjWzJEGq3eeY3CdZ$hJW0oB4X.hmJFW42SOCGxRXA8SdNRXLRwdnBPI/tPyphyT1CYXFbxEh7u.GPmNp2s3IHMSaut4DSXjutMqL/31::0:99999:7::: liujiaxin02:$6$uU6mKOlv$Lyy0XjagGHyTHLClqKoIx4b/RYooUkfbujr6A/nSwQrOHCCSCyQmYiXlTsuReGNhWAgpCk9P/7cO.OD2ZFnXY/:19083:0:99999:7::: [root@centos7pc1 test2]# ls /home/ liujiaxin01 liujiaxin02 software test test2
使用userdel -r命令徹底刪除使用者：
[root@centos7pc1 test2]# userdel -r liujiaxin02 ## 徹底刪除使用者
檢視刪除效果：
[root@centos7pc1 test2]# tail /etc/passwd rpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologin nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin gnome-initial-setup:x:988:982::/run/gnome-initial-setup/:/sbin/nologin pcp:x:987:981:Performance Co-Pilot:/var/lib/pcp:/sbin/nologin sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin avahi:x:70:70:Avahi mDNS/DNS-SD Stack:/var/run/avahi-daemon:/sbin/nologin postfix:x:89:89::/var/spool/postfix:/sbin/nologin oprofile:x:16:16:Special user account to be used by OProfile:/var/lib/oprofile:/sbin/nologin tcpdump:x:72:72::/:/sbin/nologin liujiaxin01:x:1000:1000:liujiaxin01:/home/liujiaxin01:/bin/bash [root@centos7pc1 test2]# tail /etc/shadow rpcuser:!!:19082:::::: nfsnobody:!!:19082:::::: gnome-initial-setup:!!:19082:::::: pcp:!!:19082:::::: sshd:!!:19082:::::: avahi:!!:19082:::::: postfix:!!:19082:::::: oprofile:!!:19082:::::: tcpdump:!!:19082:::::: liujiaxin01:$6$tjWzJEGq3eeY3CdZ$hJW0oB4X.hmJFW42SOCGxRXA8SdNRXLRwdnBPI/tPyphyT1CYXFbxEh7u.GPmNp2s3IHMSaut4DSXjutMqL/31::0:99999:7::: [root@centos7pc1 test2]# ls /home/ liujiaxin01 software test test2