linux用户相关
/etc/default/useradd #linux添加用户的默认配置文件
/etc/login.defs #linux用户登陆配置文件
/etc/skel #用户目录架构相关的配置文件
Linux密码相关
启动linux，进入内核模式，按"e" --------》选择进入相应的内核，找到linux16所在的行，在行尾输入“rd.break“ --------》按”Ctrl+x“进入单用户模式 ---------》”mount -o rw.remount /sysroot“重新挂载新根，赋予读写权限 -------》"chroot /sysroot"，进入到新根 -------》”vim /etc/passwd“ 修改用户登陆shell信息，”passwd root“修改账号登陆密码 --------》”touch /.autorelabel“，创建.autorelabel文件，因为selinux开启的原因，需要用到，否则无法启动，会出现卡进度条的现象。出现卡进度条现象时，可以按键盘F5键，查看启动状态信息。按esc键，显示进度条读取的进度。
[root@x112 ~]# sestatus SELinux status: enabled SELinuxfs mount: /sys/fs/selinux SELinux root directory: /etc/selinux Loaded policy name: targeted Current mode: enforcing Mode from config file: enforcing Policy MLS status: enabled Policy deny_unknown status: allowed Max kernel policy version: 28 [root@x112 ~]# getenforce Enforcing [root@x112 ~]# cat /etc/selinux/config # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. #SELINUX=disabled SELINUX=enforcing # SELINUXTYPE= can take one of three two values: # targeted - Targeted processes are protected, # minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection. SELINUXTYPE=targeted
selinux在linux7单用户模式，一直显示为disabled，但是/etc/selinux/config中的配置只要是enforcing，重启生效，就代表selinux是开启状态。