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2025-03-31 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >
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#! / bin/bash
# this script is mainly aimed at tuning the parameters of the system that has just been installed.
# check id root #
If [$(id-u)! = "0"]; then
Echo "You must be root to run this script..."
Exit 1
Fi
# set function #
CentOS6 ()
{
Yum install-y wget
/ usr/bin/wget-qO / etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
/ usr/bin/wget-qO / etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
Yum install-y tree screen make cmake vim ntpdate telnet nc lrzsz gcc gcc-c++
/ etc/init.d/iptables stop & & chkconfig iptables off
}
CentOS7 ()
{
Yum install-y wget
/ usr/bin/wget-qO / etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
/ usr/bin/wget-qO / etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
Yum install-y tree screen make cmake vim ntpdate telnet nc lrzsz gcc gcc-c++
Systemctl stop firewalld.service & & systemctl disable firewalld.service
}
# get system Edition #
Edition= `grep-o'[[: digit:]]'/ etc/redhat-release | head-1`
If [$Edition = ='6']; then
Echo-e "\ n\ 033 [34mStart CentOS6 installation.\ 033 [0m\ n"
CentOS6
Elif [$Edition = ='7']; then
Echo-e "\ n\ 033 [34mStart CentOS7 installation.\ 033 [0m\ n"
CentOS7
Else
Echo "This system is not CentOS 6, script execution failed..."
Exit 2
Fi
# the gorgeous split line 6 is different from the command 7, and the same command is written below # #
# disable selinux & & iptables #
Sed-I'/ SELINUX/s/enforcing/disabled/' / etc/selinux/config
Setenforce 0
# set vim #
Sed-I "7a alias vi='vim'" / root/.bashrc
Sed-I "8a alias grep='grep-- color'" / root/.bashrc
# set ssh #
Ssh_cf= "/ etc/ssh/sshd_config"
Sed-I 's/#GSSAPIAuthentication no/GSSAPIAuthentication no/g' $ssh_cf
Sed-I 's/GSSAPIAuthentication yes/#GSSAPIAuthentication yes/g' $ssh_cf
Sed-I "s/#UseDNS yes/UseDNS no/" $ssh_cf
# set ntpdate #
Echo'* / 4 * / usr/sbin/ntpdate time.windows.com > / dev/null 2 > & 1'> > / var/spool/cron/root
\ cp / usr/share/zoneinfo/Asia/Shanghai / etc/localtime
#\ cp / usr/share/zoneinfo/America/New_York / etc/localtime New York (West 5)
#\ cp / usr/share/zoneinfo/Asia/Shanghai / etc/localtime China (East 8)
#\ cp / usr/share/zoneinfo/Asia/Bangkok / etc/localtime Thailand (East 7)
#\ cp / usr/share/zoneinfo/Asia/Korea / etc/localtime Korea (East 9)
#\ cp / usr/share/zoneinfo/Asia/Tokyo / etc/localtime Japan (East 9)
# set limits #
Echo-e "* soft nofile 65535\ n * hard nofile 65535" > > / etc/security/limits.conf
# set kernel #
> / etc/sysctl.conf
Cat > > / etc/sysctl.conf
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