Linux and Windows Interop file user profiles and password profiles user groups/user management

Linux and Windows inter-pass files (provided that you must use Xshell or SECURECRT, you cannot use putty)

Yum install-y lrzsz//linux and Windows cross-transfer files need to be installed on Linux yum Lrzsz

SZ file name//linux file to Windows

RZ Enter, select File//windows to the Linux file, upload to the current directory

Xshell and SECURECRT support;
Putty not supported

Ii. user profile and password configuration file
[Email protected] ~]# CAT/ETC/PASSWD
Root:x:0:0:root:/root:/bin/bash//used: Divided into 7 segments user name: Password: UID: Group ID: User comment information: User home directory: User shell
Bin:x:1:1:bin:/bin:/sbin/nologin
Daemon:x:2:2:daemon:/sbin:/sbin/nologin
Adm:x:3:4:adm:/var/adm:/sbin/nologin

The real password for the Linux system is stored under/etc/shadow, but the password is encrypted.
[Email protected] ~]# Cat/etc/shadow
Root:$6$nlejlezy$kbv252z71egreugmwbxkei9yo3pq9rtpl3.lxsis0qdzwktcguit3yc7cbzjbfdx5lv0.kjwetlrsjadifs4p0 : 17622:0:99999:7::://etc/shadow with/etc/passwd file one by one below
Bin::17110:0:99999:7::://use: Split into 9 segments User name: User password: Last change password distance January 1, 1970 How many days: how many days will it take to change the password: How long before the password expires: How many days before password expiration warning: How many days the password has expired however, you have not changed the password, this password will be locked: The life cycle of an account: Reserved fields
Daemon:: 17110:0:99999:7:::
Adm:*:17110:0:99999:7:::

[Email protected] ~]# Head-n1/etc/shadow; Tail-n2/etc/shadow
Also displays the first and last two lines of a file in the command format: head-n1 file path; TAIL-N2 file path

Third, user group management
[Email protected] ~]# Ls/etc/shadow
Shadow shadow-//with a minus sign file is the system to help us automatically back up a copy, such as not mind delete user files, you can copy a minus the same file to use
[Email protected] ~]# Ls/etc/gshadow
Gshadow gshadow-
[Email protected] ~]# LS/ETC/PASSWD
passwd passwd-
[Email protected] ~]# Ls/etc/group
Group group-

Add Group
[[email protected] ~]# Groupadd GRP1//Add GRP1 Group
[[email protected] ~]# Tail-n1/etc/group//View the last line of the group file
GRP1:X:1003:
[[email protected] ~]# GROUPADD-G 1005 grp2//Add and specify GRP2 Group ID 1005
[[email protected] ~]# Tail-n3/etc/group//View the last three lines of the group file
SLOCATE:X:21:
GRP1:X:1003:
GRP2:X:1005:

Delete a group
[[email protected] ~]# Groupdel GRP1//delete GRP1 Group
Note: An empty group can be deleted, and there are users below the group that cannot be deleted

Iv. User Management
Add user
[[email protected] ~]# Useradd user3//Add User3 User
[Email protected]-01 ~]# tail-n2/etc/passwd
Hll:x:1001:1002::/home/hll:/bin/bash
User3:x:1002:1006::/home/user3:/bin/bash

Add and specify UID and group
[[email protected] ~]# useradd-u 1004-g grp2 user4//Add USER4 user and specify UID 1004, add to GRP2 Group
[Email protected] ~]# TAIL-N3/ETC/PASSWD
Hll:x:1001:1002::/home/hll:/bin/bash
User3:x:1002:1006::/home/user3:/bin/bash
User4:x:1004:1005::/home/user4:/bin/bash

Add users and specify home directories
[Email protected] ~]# useradd-u 1010-g grp2-d/home/user3-s/sbin/nologin User6

-M option: Add user but do not create user home directory
[[email protected] ~]# useradd-m user7//Add User7 User but do not create its home directory

Delete User
[[email protected] ~]# Userdel user3//delete user3 user, but do not delete user's home directory

-R option: Delete User's home directory while deleting users
[Email protected] ~]# Userdel-r user4
[Email protected] ~]# Ls/home
HLL user1 User3

Linux and Windows Interop file user profiles and password profiles user groups/user management