shell script自动搭建简单的linux系统初始化脚本

#!/bin/bash

#

#Shell name:install_uniso_ssh.sh

#

#Program:

# initializing you system,after installed Linux

#

#version 1.0

#

#

#Author:perofu

#

#Mail: perofu.com@gmail.com

#

#History:

# 2012/12/8

#Usage:

# It used to initializing, after you installed Linux

#

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:.

export PATH

su_group=

#create user as root permission in sudo

name_user=perofu

cat << EOF

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

| === Welcome to Linux System init === |

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

+--------------------------by perofu----------------------------+

EOF

#Add users and set permissions in sudo //????SA?û???????sudoȨ??

cat << EOF

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

+------Welcome to Add users and set permissions in sudo.------+

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

EOF

cp /etc/sudoers /etc/sudoers.bak

useradd ${name_user}

passwd $[name_user]

echo "Add users and set permissions in sudo.------>OK"

echo "${name_user} ALL=(ALL)ALL" >>/etc/sudoers

/usr/sbin/visudo -c

#############################sudo####################

#vim

echo "alias vi=\"vim\"" >> /etc/rc.local

#set ntp

yum -y install ntp

echo "* 3 * * * /usr/sbin/ntpdate 210.72.145.44 > /dev/null 2>&1" >> /etc/crontab

service crond restart

#set ulimit

echo "ulimit -SHn 102400" >> /etc/rc.local

#set locale with china

#true > /etc/sysconfig/i18n

#cat >>/etc/sysconfig/i18n<<EOF

#LANG="zh_CN.GB18030"

#SUPPORTED="zh_CN.GB18030:zh_CN:zh:en_US.UTF-8:en_US:en"

#SYSFONT="latarcyrheb-sun16"

#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

net.ipv4.tcp_wmem = 4096 16384 4194304

net.core.wmem_default = 8388608

net.core.rmem_default = 8388608

net.core.rmem_max = 16777216

net.core.wmem_max = 16777216

net.core.netdev_max_backlog = 262144

net.core.somaxconn = 262144

net.ipv4.tcp_max_orphans = 3276800

net.ipv4.tcp_max_syn_backlog = 262144

net.ipv4.tcp_timestamps = 0

net.ipv4.tcp_synack_retries = 1

net.ipv4.tcp_syn_retries = 1

net.ipv4.tcp_tw_recycle = 1

net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_mem = 94500000 915000000 927000000

net.ipv4.tcp_fin_timeout = 1

net.ipv4.tcp_keepalive_time = 1200

net.ipv4.ip_local_port_range = 1024 65535

EOF

/sbin/sysctl -p

echo "sysctl set OK!!"

#close ctrl+alt+del

sed -i "s/ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/#ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/" /etc/inittab

/sbin/init q

#disable ipv6

cat << EOF

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

| === Welcome to Disable IPV6 === |

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

EOF

echo "alias net-pf-10 off" >> /etc/modprobe.conf

echo "alias ipv6 off" >> /etc/modprobe.conf

/sbin/chkconfig --level 35 ip6tables off

echo "ipv6 is disabled!"

#disable selinux

sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config

echo "selinux is disabled,you must reboot!"

#vim

#sed -i "8 s/^/alias vi='vim'/" /root/.bashrc

#echo 'syntax on' > /root/.vimrc

#zh_cn

#sed -i -e 's/^LANG=.*/LANG="en"/' /etc/sysconfig/i18n

#init_ssh

ssh_cf="/etc/ssh/sshd_config"

sed -i -e '74 s/^/#/' -i -e '76 s/^/#/' $ssh_cf

#sed -i "s/#Port 22/Port 65535/" $ssh_cf

sed -i "s/#UseDNS yes/UseDNS no/" $ssh_cf

#client

sed -i -e '44 s/^/#/' -i -e '48 s/^/#/' $ssh_cf

service sshd restart

echo "ssh is init is ok.............."

#remove some soft of rpm which we didn't need

softname=finger pump apmd lsapnptools redhat-logos mt-st kernel-pcmcia-cs setserial erdhat-release eject linuxconf kudzu gd bc getty_ps raidtools pciutils mailcap setconsole gnupg

for i in ${softname}

do

rpm -e $i

done

#forbidding used console

rm -f /etc/security/console.apps/servicename

rm -f /etc/security/console.apps/halt

rm -f /etc/security/console.apps/poweroff

rm -f /etc/security/console.apps/reboot

rm -f /etc/security/console.apps/shutdown

#rm -f /etc/security/console.apps/xserver

#if delete xserver??only root can be start X Windows

#forbidding some one access console

for i in /etc/pam.d/*

do

sed '/[^#].*pam_console.so/s/^/#/' < $i > foo && mv foo $i

done

#optimizing /etc/aliases

afile=/etc/aliases

#[ -e ${afile} ] || exit

sed -i 's/^games/#games/' ${afile}

sed -i 's/^ingree/#ingree/' ${afile}

sed -i 's/^system/#system/' ${afile}

sed -i 's/^toor/#toor/' ${afile}

sed -i 's/^uucp/#uucp/' ${afile}

sed -i 's/^manager/#manager/' ${afile}

sed -i 's/^dumper/#dumper/' ${afile}

sed -i 's/^operator/#operator/' ${afile}

sed -i 's/^decode/#decode/' ${afile}

/usr/bin/newaliases

#ignore ping

echo "echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all" >> /etc/rc.local

#forbidding route of IP re-path

for f in /proc/sys/net/ipv4/conf/*/accept_source_route

do

echo 0 > $f

done

#protect TCP SYN Cookie

echo "echo 1 > /proc/sys/net/ipv4/tcp_syncookies" >> /etc/rc.local

#protect /etc/services

chattr +i /etc/services

#root can login one tty device that can be allow

num=$(grep tty /etc/securetty|wc -l)

end=$(seq 2 ${num})

for i in ${end}

do

sed -i "s/tty${i}/#tty${i}/" /etc/securetty

done

#delete users and groups that we didn't need

users="adm lp sync shutdown halt news uucp operator games gopher"

groups="adm lp news uucp games dip pppusers popusers slipusers"

for i in ${users}

do

userdel ${i}

done

for g in ${groups}

do

userdel ${g}

done

#set purview

chmod 600 /etc/passwd

chmod 600 /etc/shadow

chmod 600 /etc/group

chmod 600 /etc/gshadow

#chattr +i /etc/passwd

#chattr +i /etc/shadow

#chattr +i /etc/group

#chattr +i /etc/gshadow

#denying everyones use cammond of su to become root

#su_group=

file=/etc/pam.d/su

if [ -z ${su_group} ]

then

su_group=root

fi

cp ${file} ${file}.bak

cat <<EOF > ${file}

#%PAM-1.0

auth sufficient /lib/security/pam_rootok.so debug

auth required /lib/security/pam_wheel.so group=${su_group}

EOF

cat ${file}.bak >> ${file}

rm -rf ${file}.bak

#limit resource

cat <<EOF-END >> /etc/security/limits.conf

* hard core 0

* hard rss 5000

* hard nproc 20

EOF-END

cat <<EOF >> /etc/pam.d/logon

session required /lib/security/pam_limits.so

EOF

#remove info of login

rm -f /etc/issue

rm -f /etc/issue.net

#virtual memory

echo "echo \"100 1200 128 512 15 5000 500 1884 2\">/proc/sys/vm/bdflush" >> /etc/rc.local

#adding system file count that can be open

ulimit -n 90000

#chkser

#tunoff services

#--------------------------------------------------------------------------------

cat << EOF

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

| === Welcome to Tunoff services === |

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

EOF

#---------------------------------------------------------------------------------

for i in `ls /etc/rc3.d/S*`

do

#CURSRV=`echo $i|cut -c 4-`

CURSRV=`echo $i|cut -c 15-`

echo $CURSRV

case $CURSRV in

crond | irqbalance | microcode_ctl | network | random | sshd | syslog | local )

echo "Base services, Skip!"

;;

*)

echo "change $CURSRV to off"

chkconfig --level 235 $CURSRV off

service $CURSRV stop

;;

esac

done

#reboot system to finish optimization

reboot

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