centos系统服务优化SHELL脚本

# disable ipv6  
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  
cat >/root/.vimrc<<EOF  
syntax on 
set expandtab  
set shiftwidth=4  
set softtabstop=4  
set tabstop=4  
EOF  
 
 
# init_ssh  
sed -i ‘/GSSAPI/ {s/yes/no/g};/UseDNS/ {s/.*/UseDNS no/};/^SyslogFacility/ {s/AUTHPRIV/local5/g}’ /etc/ssh/sshd_config   
sed -i ‘/StrictHostKeyChecking/ {s/.*/StrictHostKeyChecking no/}’ /etc/ssh/ssh_config  
sed -i ‘$ a\# save sshd messages also to sshd.log \nlocal5.* \t\t\t\t\t\t /var/log/sshd.log’  /etc/syslog.conf    
echo “Configured SSH initialization!” 
 
# chkser  
# tunoff services  
for i in `ls /etc/rc3.d/S*`  
do  
             CURSRV=`echo $i|cut -c 15-`  
 
echo $CURSRV  
case $CURSRV in 
         crond | irqbalance | microcode_ctl | network | random | sendmail | sshd | syslog | local | mysqld | nginx | fastcgi )  
     echo “Base services, Skip!” 
     ;;  
     *)  
         echo “change $CURSRV to off” 
         chkconfig –level 235 $CURSRV off  
         service $CURSRV stop  
     ;;  
esac  
done  
 
# set ntpdate  
# crontab  
crontab -l >> /tmp/crontab2.tmp  
echo ’15 1 * * * /usr/sbin/ntpdate ntp.api.bz;/usr/sbin/hwclock -w > /dev/null 2>&1′ >> /tmp/crontab2.tmp  
crontab /tmp/crontab2.tmp  
rm /tmp/crontab2.tmp  
 
echo -e “\033[32;49;1mInitialization complete” 
echo -en “\033[39;49;0m”