RHCE7 Learning miles-4 user rights, simple process management

#创建用户useradd ABC use the VIPW command to view/etc/passwdwhether a new user exists under the file #G却换到最后一行 # When creating an account, a new group is created by default, and the group name is the same as the user name Groupadd ccnavigr #查看组文件 # Add the user to the group gpasswd-A ABC ccna# view users in those groupsgroupsAbc# See who the current user isWhoAmI#切换用户su-abc#-On behalf of the Environment also change # Delete user Userdel Abcgroupdel CCNA View User IDIDroot#root User ID is 1 the maximum #id value the smaller the permissions the greaterchmodModify Permissions-rwxrwxrwx #第一个rwx Owner's permissions #第二个rwx delegate group membership permissions # Third rwx on behalf of other member rights R:4 W:2X:1ChownRoot a.b Modify file ownerchgrpRoot A.B Modify the group to which the file belongs

2. Simple Process Management

　　

Ps-ef | grep firewalld

Which FIREWALLD

Kill ID Number

Kill-9 ID Number #强制删除

Ps-ef| More #分页显示, Space page, q exit

VI a.sh on behalf of shell scripts

1 #! /bin/bash2sleep3echo finshed!

CTRL +Z the current terminal process into the background,

Jobs view

Ps-ef | grep a.sh

Pausing a process Kill-stop 8000

Start Pause Process Kill-count 8000

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Some network-related commands

IP addr

NETSTAT-TLUNP viewing the status of a network connection

wget download Command

SCP sends a file to a remote server

SCP ABC [Email protected]:/root

Re-enter the password

Hostname View Host name,

Hostname abc.com temporary entry into force

Vi/etc/hostname Permanent entry into force

Vi/ect/host Modify domain name, IP correspondence

nslookup Query the relationship of the corresponding domain name

Restart command reboot Shutdow-r now

Mount Mount/dev/cdrom/abc

Unmount Mount Umount/abc

Df-h Viewing mount conditions

FREE-M Viewing memory information

Top View CPU Usage

Date to view dates

Cal View Calendar

Date month datetime year

Rpm-aq View all installations

Rpm-aq|grep httpd to see if a software is installed

CD-ROM Packages

RPM-IVH Installing the Software

RPM-E Package Uninstall Software

Rpm-q Zip lookup Software

RPM-UVH Upgrade Package

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Yum Server

Dependencies can be resolved automatically.

Configure Yum Source ...

cd/etc/yum.repos.d/

Creating a local Yum source

1. mkdir Bak

See if the yum command installs Rpm-qa |yum

[Local_yum] #名称

Name=local_yum

Baseurl=file:///abc

Enabled=1

Gpgcheck=1

Gpgkey=file://abc/rpm-gpg-key-centos-7

Yum Clean all clears cache information

RHCE7 Learning miles-4 user rights, simple process management