linux 系统基本优化

Posted 2020-08-23

centos6 

#!/bin/bash

yum clean all

yum makecache || echo -e "\e[1;31m Please check that the yum source address is correct \e[0m" 

# Before the installation check

for i in $(echo "man openssh-clients elinks lsof dstat sysstat vim");do

        service_packages=$(rpm -qa |grep "^"$i"-[0-9]")

        if [ $? == 0 ];then

                echo -e "\e[1;32m $service_packages is installed!\e[0m"

        else

                echo -e "\e[1;31m $i is not installed!,In the installing,Please wait.\e[0m"

                 yum install $i -y > /dev/null 2>&1 

        fi

done

grep "nofile         65535" /etc/security/limits.conf || echo "*                -       nofile         65535" >>/etc/security/limits.conf

grep ignorespace /etc/profile.d/history.sh ||echo "export HISTCONTROL=ignorespace" >> /etc/profile.d/history.sh; source /etc/profile.d/history.sh

grep "export HISTTIMEFORMAT" /etc/profile.d/history.sh ||echo ‘export HISTTIMEFORMAT="%F-%T "‘ >>/etc/profile.d/history.sh

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