user uid

First, user management1. Why users need1) Reasonable allocation of computer and network resources 2) You can control the user's access to the system. 3) Identity authentication 4) The process runs as a user2. User classificationThe user's role is

Create userDescription: Users are divided into 3 kinds of 1, super users 2, ordinary users, 3, virtual users.Case: Create the above 3 users1. Under normal circumstances, Linux has only one superuser root, but it is dangerous to create multiple super

Basic commands (File Content Management)1.cat: Display text file contents at current terminalFormat: Cat [File path]-N number of line numbers for all outputs starting from 1-B is similar to-N, except that the blank line is not numbered;2.head:

Main contentLinux InstallationCommon commandsUse of the VI editorTelnetHost name SettingsSettings for IPSettings for the firewallUser and group account managementFile Rights ManagementRPM Package ManagementInstallation of softwareJdk,tomcat,

First, we have to understand the user management and authority management mechanismA: Authentication mechanismIdentity (Username/password) Username/passwordA:permission PermissionsMode modesOwnership ownershipIi. introduction of users and groups

During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top

You can view the contents of the%mem directly after you use the top command. You can choose to view by process or by user, if you want to see the process memory usage of the Oracle user, you can use the following command:(1) TopThe top command is a

During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top

Top: View CPU and Memory usageDuring system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top

User account and group account managementHere are some of the collation and instance configuration between the user account and the group account.The user and group accounts in the Linux system are divided into the following points:Superuser:

User and group management related commands are described and used:In general, the commands involved are: Useradd,usermod,passwd,userdel,groupadd,groupmod,gpasswd,groupdel,chage,chsh,chfn,id,w, Who,whoami, Su,finger1, useradd:create a new user or

Reference blog:View Linux Process Memory usageYou can view the contents of the%mem directly after you use the top command. You can choose to view by process or by user, if you want to see the process memory usage of the Oracle user, you can use the

First, view the user/etc/passwd[Email protected] ~]# Cat/etc/passwd|head-5root:x:0:0:root:/root:/bin/bashbin:x:1:1:bin:/bin:/sbin/nologindaemon :

Linux process Memory Consumption view method(1) TopYou can view the contents of the%mem directly after you use the top command. You can choose to view by process or by user, if you want to see the process memory usage of the Oracle user, you can use

Configuration file)/etc/passwdDocument structure:Separated by ":" Into 7 Fields "Username:x:uid:gid:remark:homedir:shell"Default permissions:-rw-r--r--What each field means:(1) username, user nameNaming conventions: Uppercase and lowercase letters,

1.STRICTFP, which is the strict float point (exact float). STRICTFP keyword can be applied to classes, interfaces, or methods. When declaring a method with STRICTFP keyword, all of the float and double expressions in the method adhere strictly to

Anatomy of a/etc/passwd fileFile format:Root:x:0:0:root:/root:/bin/bashUser name: Password bit: uid:gid[default group ID]: annotative Description: Host directory: shell[7 section]Linux User categories:Super User (root,uid=0)Normal User (uid=500~60000

Script is a magical command that can record the session of a terminal and then use Scriptreplay to play the results of its recordings to others. The benefit of script is that all of your actions in the terminal, the commands you've knocked out, and

Understanding Users1. User defined:user is the identity of the system users, in the system, the user is stored as a number of strings + several system configuration filesExample: system configuration files that are related to user

UserDefinition: The user is the identity of the system consumerThe user is stored in the system as a number of channeling characters + several system configuration filesUser information involves the system configuration file:/ETC/PASSWD User