Initialization scripts for Centos 5.X

#!/bin/bash

# program:

# System_init_shell

# History:

# 2012/04/1 25061008@qq.com

# Release:

# 1.1

Cat << EOF

+--------------------------------------------------------------+

| = = Welcome to Centos 5.x System init = = |

+--------------------------------------------------------------+

+---------------------------by Opsren--------------------------+

Eof

#CHANGE Yum

Cd/etc/yum.repos.d

MV Centos-base.repo Centos-base.repo.bak

wget Http://mirrors.163.com/.help/CentOS-Base-163.repo

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

Yum Clean metadata #清除以前的缓存

Yum Makecache #重新建立缓存

#update GCC

Yum-y Install GCC gcc-c++ Bison patch unzip Mlocate Flex Lrzsz Sysstat

#set NTP

/usr/sbin/ntpdate ntp.api.bz

echo "*/5 * * * */usr/sbin/ntpdate ntp.api.bz >/dev/null 2>&1" >>/var/spool/cron/root

Service Crond Restart

#set Clock

Hwclock--set--date= "' Date +%d\%T '"

Hwclock--hctosys

Cat >>/etc/security/limits.conf << EOF

* Soft Nofile 102400

* Hard Nofile 102400

Eof

#close Useless Service

For i in ' ls/etc/rc3.d/s* '

Todo

Cursrv= ' echo $i |cut-c 15-'

Echo $CURSRV

Case $CURSRV in

Cpuspeed | Crond | Irqbalance | Network | sshd | syslog | Local)

echo "Base services, skip!"

;;

*)

echo "Change $CURSRV to Off"

Chkconfig--level 2345 $CURSRV off

Service $CURSRV Stop

;;

Esac

Done

The echo "Service is init is ok ..."?..

#set LANG

:>/etc/sysconfig/i18n

Cat >>/etc/sysconfig/i18n << EOF

Lang= "en_US. UTF-8 "

Eof

#set Sysctl

True >/etc/sysctl.conf

Cat >>/etc/sysctl.conf << EOF

Net.ipv4.ip_forward = 0

Net.ipv4.conf.default.rp_filter = 1

Net.ipv4.conf.default.accept_source_route = 0

KERNEL.SYSRQ = 0

Kernel.core_uses_pid = 1

Net.ipv4.tcp_syncookies = 1

KERNEL.MSGMNB = 65536

Kernel.msgmax = 65536

Kernel.shmmax = 68719476736

Kernel.shmall = 4294967296

Net.ipv4.tcp_max_tw_buckets = 6000

Net.ipv4.tcp_sack = 1

net.ipv4.tcp_window_scaling = 1

Net.ipv4.tcp_rmem = 4096 87380 4194304