给Linux添加新用户，新建用户，新建帐号

添加用户组

sudo groupadd groupname

添加用户

sudo useradd username -m -s /sbin/nologin -d /home/username -g groupname
-s /sbin/nologin 设置不能登陆 -s /bin/false(老方法) 也行
-d 设置用户主目录
-g 用户组
-m 创建用户目录

useradd的具体参数为

[root@317304 ~]# useradd --help
Usage: useradd [options] LOGINOptions:-b, --base-dir BASE_DIR       base directory for the home directory of thenew account-c, --comment COMMENT         GECOS field of the new account-d, --home-dir HOME_DIR       home directory of the new account-D, --defaults                print or change default useradd configuration-e, --expiredate EXPIRE_DATE  expiration date of the new account-f, --inactive INACTIVE       password inactivity period of the new account-g, --gid GROUP               name or ID of the primary group of the newaccount-G, --groups GROUPS           list of supplementary groups of the newaccount-h, --help                    display this help message and exit-k, --skel SKEL_DIR           use this alternative skeleton directory-K, --key KEY=VALUE           override /etc/login.defs defaults-l, --no-log-init             do not add the user to the lastlog andfaillog databases-m, --create-home             create the user's home directory-M, --no-create-home          do not create the user's home directory-N, --no-user-group           do not create a group with the same name asthe user-o, --non-unique              allow to create users with duplicate(non-unique) UID-p, --password PASSWORD       encrypted password of the new account-r, --system                  create a system account-s, --shell SHELL             login shell of the new account-u, --uid UID                 user ID of the new account-U, --user-group              create a group with the same name as the user-Z, --selinux-user SEUSER     use a specific SEUSER for the SELinux user mapping

更改用户登录权限

在增加了-s /sbin/nologin 参数后，那么这个帐号就不能登陆了，如果想要恢复登陆使用

sudo usermod -s /bin/bash username

禁用用户登录权限

sudo usermod -s /sbin/nologin username

设置密码

给用户设置密码，这样帐号就能使用了。

sudo passwd username

删除用户

删除用户

sudo userdel username

linux下查看所有用户及所有用户组