Linux Service control commands

Just learn Linux, do some notes, hope to be helpful!!!

Learning without thinking is not the case, but thinking without learning is dangerous.

1. Disk partition representation

HD stands for IDE Hard drive (Note:/DEV/HDC fixed to optical drive)

SD represents SCSI hard disk

SDA represents the first SCSI drive

SDA7 represents the third logical partition of the first SCSI hard disk

2. File system type

EXT4, 4th Generation Extended (Extended) file system

Swap, swap file system

3. Firewall iptables

Current shutdown: Service iptables stop

Current start: Service iptables start

Current Restart: Service iptables restart

Display Status: Service iptables status

Set power on off iptables

Chkconfig iptables off

4.Selinuxa

Permanently close selinux:

Vim/etc/sysconfig/selinux

Modify "selinux=disabled"

Save and restart the computer in effect

To view the SELinux status:

Getenforce

Set SELinux temp Status:

Setenforce 0/1

5.init process

Run/sbin/init program loaded by Linux kernel

Is the first process in a system

PID (Process tag) number is always 1

6.init Related configuration Files

/etc/inittab Configuring the default run level

7.runlevels--Run Level

0 Turn off the machine

1 Single-User mode

2 Non-network multi-user character mode

3 full multi-user character mode

4 Not assigned to use

5 Graphical Desktop

6 restart

8. System Service Control

Two different ways:

Service Name control type

Example: Service Network restart

or/etc/rc.d/init.d/service name control type

Control type:

Start: Startup

STOP: Stop

Restart: restart

Reload: Reload

Status: View service status)

9. System service Management Tools

NTSYSV Tools

Provides an interactive, visual window

Can be run at the character terminal

Facilitates centralized management of multiple services

Chkconfig Tools

Do not provide interactive, visual windows

More efficient management of individual services

10. Set the startup status of the system service

Chkconfig--level Level list service name On|off

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Linux Service control commands