IT博客汇 | 脚本分享--centos系统初始化

脚本分享--centos系统初始化

深夜的蚊子发表于 2011-06-07 13:51:55
前几天逛51cto，看到一篇《Linux 基本系统初始化脚本第一版》的文章，颇受启发，同时该脚本也正是我最近想要实现的，本着开源的精神加上对作者的负责，先将自己改版后的放出，也希望能借此带个更多人不同的思路。
蚊子本版改动也不是很大，加入了几个我常用的，软件更新很快的yum源，及epel源。
脚本如下
#! /bin/sh
# desc: remodified by www.wenzizone.cn
#------------------------------ Begin -----------------------------------------#
# welcome
cat << EOF
+------------------------------------------------------------------------------------+
|                        === Welcome to Centos System init ===                       |
+-------------------------- http://www.wenzizone.cn ---------------------------------+
+------------------------------- Author:wenzizone -----------------------------------+
EOF

echo ""

# Add yum repo source
cat << EOF
+------------------------------------------------------------------------------+
|                  === Part for adding yum repo source ===                     |
+------------------------------------------------------------------------------+
EOF

# add epel repo
echo -n "Installing the epel yum repo: "
/bin/rpm -i http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm >/dev/null 2>&1

if [ $? -eq 0 ]
then
    echo "OK"
else
    echo "Failed"
fi
echo ""

# add Atomic repo
echo -n "Installing the Atomic GPG key: "
/bin/rpm --import http://www.atomicorp.com/RPM-GPG-KEY.art.txt
echo "OK"

echo -n "Installing the Atomic yum repo: "
cat << EOF >/etc/yum.repos.d/atomic.repo
# Name: Atomic Rocket Turtle RPM Repository for CentOS / Red Hat Enterprise Linux 5 - 
# URL: http://www.atomicrocketturtle.com/
# Note: This isn't covered by ASL support. -Scott
[atomic]
name = CentOS / Red Hat Enterprise Linux \$releasever - atomicrocketturtle.com
mirrorlist = http://www.atomicorp.com/mirrorlist/atomic/centos-5-\$basearch
#mirrorlist = http://www.atomicorp.com/channels/atomic/centos/5/mirrors-atomic
enabled = 1
priority = 1
protect = 0
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY.art.txt
gpgcheck = 1

# Almost Stable, release candidates for [atomic]
# Note these are not supported by anyone. -Scott
[atomic-testing]
name = CentOS / Red Hat Enterprise Linux \$releasever - atomicrocketturtle.com - (Testing)
mirrorlist = http://www.atomicorp.com/mirrorlist/atomic-testing/centos-5-\$basearch
enabled = 0
priority = 1
protect = 0
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY.art.txt
gpgcheck = 1

# Untested, Unstable, known buggy, and incomplete packages. 
# Note, you shouldn't be here unless you are me. -Scott
#[atomic-bleeding]
#name = CentOS / Red Hat Enterprise Linux \$releasever - atomicrocketturtle.com - (Bleeding)
#baseurl = http://www.atomicorp.com/channels/atomic-bleeding/centos/5/\$basearch/
#enabled = 0
#priority = 1
#protect = 0
#gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY.art.txt
#gpgcheck = 1
EOF
echo "OK"
echo ""

# add jasonlitka yum repo
echo -n "Installing the jasonlitka GPG key: "
/bin/rpm --import http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
echo "OK"

echo -n "Installing the jasonlitka yum repo: "
cat << EOF >/etc/yum.repos.d/utterramblings.repo
[utterramblings]
name=Jasons Utter Ramblings Repo
baseurl=http://www.jasonlitka.com/media/EL\$releasever/\$basearch/
enabled=1
gpgcheck=1
gpgkey=http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
EOF
echo "OK"
echo ""

# Add puppet yum repo
echo -n "Installing the Puppet yum repo: "
cat << EOF >/etc/yum.repos.d/puppet.repo
[epel-puppet]
name=epel puppet
baseurl=http://tmz.fedorapeople.org/repo/puppet/epel/5/\$basearch/
enabled=1
gpgcheck=0
EOF
echo "OK"
echo ""

#disable ipv6 
cat << EOF
+----------------------------------------------------------------------+
|             === Welcome to tuning system config ===                  |
+----------------------------------------------------------------------+
EOF
echo ""
echo -n "Disabling ipv6: "
echo "alias net-pf-10 off" >> /etc/modprobe.conf
echo "alias ipv6 off" >> /etc/modprobe.conf
/sbin/chkconfig --level 35 ip6tables off
echo "OK"
echo ""

#disable selinux
echo -n "Disabling selinux: "
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
echo "OK"
echo "You should reboot you server after init system"
echo ""

#vim 
echo -n "Configing vi config: "
echo 'syntax on' > /root/.vimrc
echo "OK"
echo ""

# configure file max to 65536
echo -n "tuning file max description: "
cat <> /etc/security/limits.conf
*                soft              nofile             65536
*                soft              nofile             65536
EOF
echo "OK"
echo ""

# turnoff services 
#-------------------------------------------------------------------------------- 
cat << EOF
+--------------------------------------------------------------------------+
|                  === Welcome to Turnoff services ===                     |
+--------------------------------------------------------------------------+
EOF
#--------------------------------------------------------------------------------

for i in `ls /etc/rc3.d/S*`
do
    CURSRV=$(echo $i|cut -c 15-)
 
    #echo ${CURSRV}
    case ${CURSRV} in
        cpuspeed | crond | irqbalance | microcode_ctl | network | random | readahead_early| smartd | sendmail | sshd | syslog | local )
            ;;
        *)
            echo "change ${CURSRV} to off"
            chkconfig ${CURSRV} off
            service ${CURSRV} stop
            echo ""
            ;;
    esac
done
echo "Turning off Services: OK"
echo ""

# tune the kernel config
cat << EOF
+-----------------------------------------------------------------------+
|                 === Welcome to Tune kernel config ===                 |
+-----------------------------------------------------------------------+
EOF

echo -n "Tuning kernel config: "
cat << EOF >> /etc/sysctl.conf
# Decrease the time default value[7200] for tcp_keepalive_time connection
net.ipv4.tcp_keepalive_time = 1800

# These ensure that TIME_WAIT ports either get reused or closed fast.
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_tw_recycle = 1

# TCP memory
net.core.rmem_max = 16777216
net.core.rmem_default = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 262144

net.ipv4.tcp_max_orphans = 262144
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2

net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 10
net.ipv4.tcp_tw_reuse = 1
net.core.wmem_default = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.ip_local_port_range = 1024 65535
EOF

echo "OK"
echo ""

echo "Finish init server system, Please reboot you server to take the tuning effect!!"
脚本分享--centos系统初始化

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