CENTOS7 Command Summary

1. View CPU Information

Lscpu

2, network configuration

IP Route View Route

Nmcli

NMCLI connection Show Show all connections

NMCLI Connection Show-a shows only the currently active connection

NMCLI Device status Lists the list of devices identified by NetworkManager and their status

NMCLI Device Disconnect eno16777736 Stop interface

NMCLI device connect eno16777736 boot interface

Nmtui setup in a similar CENTOS6

Configure host Name

/etc/hostname

Hostnamectl

Hostname

3, System language Settings

The locale configuration file is/etc/locale.conf, and is set by the LOCALECTL command;

Localectl Status View current configuration

Localectl list-locales |grep CN View available regional languages

Localectl Set-locale Lang=zh_cn.utf8 Setting the regional language

4, configure time and date

Timedatactl Date

Timedatectl equivalent to TIMEDATECTL status

Timedatectl set-time YYYY-MM-DD Set Date

Timedatectl Set-time HH:MM:SS Set Current time

Timedatectl SET-LOCAL-RTC Boolean default, the system uses UTC time, you can turn UTC time on and off with the following command

Replacing a Boolean with yes means that the local time is used, and the replacement of no means UTC time

Note: The Boolean value here can also be true, flase

Timedatectl List-timezones View all time zones

Timedatectl set-timezone time_zone Use the command to set the time zone

You can also copy system files directly by setting the time zone:

Timedatectl SET-NTP Boolean Timedatectl can also set whether the NTP option is turned on (boolean yes or no here)

# Cp/usr/share/zoneinfo/asia/shanghai/etc/localtime

5, clock synchronization configuration

/etc/chrony.conf

Timedatectl

Ntpdate

6,strace Ltrace

7, System Services

Systemctl-at Service

Ls/etc/systemd/system/*.service

Ls/usr/lib/systemd/system/*.service

View the active service

SYSTEMCTL-T Service--state=active

Start/Stop Service

Systemctl Start Name.service

Systemctl Stop Name.service

Set whether the boot service is started

Systemctl Enable Name.service

Systemctl Disable Name.service

View server Status

Systemctl Status Name.service

Check if the service is enabled

Systemctl is-enabled Name

Create a new service

Systemctl Daemon-reload/etc/systemd/system/*.service

8, run level

View

Who-r

RunLevel

Modify

Switch to: Run Level 3

Systemctl isolate Multi-user.target or Systemctl isolate Runlevel3.target

Switch to: Run Level 5

Systemctl isolate Graphical.target or Systemctl isolate Runleve5.target

To modify the boot default run level

SYSTEMD uses links to point to the default runlevel, as determined by the/etc/systemd/system/default.target file

Switch to run Level 3:

Delete First:/etc/systemd/system/default.target

Ln-sf/lib/systemd/system/multi-user.target/etc/systemd/system/default.target

Ln-sf/lib/systemd/system/runlevel3.target/etc/systemd/system/default.target

Or

Systemctl Set-default Multi-user.target

9, log

/var/log

Journalctl

10, configuring Grub

/etc/default/grub

Grub-set-default

Grub2-mkconfig

11. View hardware Information

LSHW (in EPEL)

Yum Install Epel-release-y

Yum Install Lshw-y

12. Load and configure kernel modules

Modprobe

removing kernel modules

Modprobe-r

View Kernel parameters

Sysctl-a

Cat/proc/cmdline

This article is from the "Stone" blog, please be sure to keep this source http://dodowolf.blog.51cto.com/793581/1755173

CENTOS7 Command Summary