Linux system optimization Scripts

#!/bin/bash

# This script was created by Tangbo.

# E_mail:[email Protected]

# version:1.0

#################################################

#################################################

#set-X

# Set Language and must be root

Export lang= "ZH_CN. GB18030 "

if [["$ (whoami)"! = "root"]]

Then

echo "Please,run this Script as root." >&2

Exit 1

Fi

#soure function Library

. /etc/init.d/functions

#config YUM Centos-base.repo

Configyum () {

echo "Exchange Centos-base.repo"

cd/etc/yum.repos.d/

CP Centos-base.repo centos-base.repo.backup.$ (date +%f)

PING-C1 www.baidu.com &>/dev/null

[$?-ne 0] && echo $ "Networking not configured-exiting." && exit 1

wget--quiet-o/dev/null Http://mirrors.163.com/.help/CentOS6-Base-163.repo &>/dev/null

MV Centos6-base-163.repo Centos-base.repo

Yum Clean all &>/dev/null

echo "Exchange Centos-base.repo Success"

Sleep 1

}

#Install Init Packages

Installtool () {

echo "Please,wait,installing:sysstat NTP net-snmp Lrzsz"

Yum-y Install Sysstat NTP net-snmp lrzsz >/dev/null 2>&1

Echo-e "Installtool\nversion information:\n ' Rpm-qa sysstat ntp net-snmp lrzsz '"

Sleep 1

}

#Close Selinux and Iptables

Initfirewall () {

echo "Close Selinux and Iptables"

Cp/etc/selinux/config/etc/selinux/config. ' Date + '%y-%m-%d_%h-%m-%s '

/etc/init.d/iptables Stop &>/dev/null

Service Iptables Status

Sed-i '/selinux/s/enforcing/disabled/'/etc/selinux/config

Setenforce 0

grep selinux=disabled/etc/selinux/config

echo "Close selinux->ok Iptables->ok"

Sleep 1

}

#Init Auto Startup Service

Initservice () {

echo "STOP Service"

Export lang= "en_US. UTF-8 "

For test in ' Chkconfig--list | grep 3:on | awk ' {print '} '

Do

# Print $test

Chkconfig--level 3 $test off

Done

For Tangbo in Crond network syslog sshd

Do

Chkconfig--level 3 $tangbo on &>/dev/null

Done

#export lang= "ZH_CN. GB18030 "

echo "Stop not Service->ok"

Sleep 1

}

#Change SSH port and stop root

Initssh () {

echo "#---sshconfig change 22,stop root---#"

Export lang= "en_US. UTF-8 "

Cp/etc/ssh/sshd_config/etc/ssh/sshd_config. ' Date + '%y-%m-%d_%h-%m-%s '

Sed-i ' s% #Port 22%port 4022% '/etc/ssh/sshd_config

Sed-i ' s% #PermitRootLogin yes%permitrootlogin no% '/etc/ssh/sshd_config

Sed-i ' s% #Port 22%port 4022% '/etc/ssh/sshd_config

Sed-i ' s% #Port 22%port 4022% '/etc/ssh/sshd_config

/etc/init.d/sshd Reload && echo "ssh Chang true" | | echo "SSH Chang false"

}

#set Sync-system-time

Syncsystemtime () {

echo "Set Sync-system-time-success"

echo "*/2 * * * * */usr/sbin/ntpdate time.nist.gov &>/dev/null 2>&1" >>/var/spool/cron/root

}

#set File Limits

OpenFiles () {

echo "#---file=65535---#"

Export lang= "en_US. UTF-8 "

\cp/etc/security/limits.conf/etc/security/limits.conf. ' Date + '%y-%m-%d_%h-%m-%s '

Sed-i '/# End of file/i\*\t\t-\tnofile\t\t65535 '/etc/security/limits.conf

ULIMIT-HSN 65535

echo "Set Files Success"

Sleep 1

}

#set Alias

Alias () {

echo "Set alias"

echo "Alias grep= ' grep--color '" >>/ROOT/.BASHRC

Source/root/.bashrc

Sleep 1

}

This article from "Bobcat" blog, declined reprint!

Linux system optimization Scripts