紧承上文《CentOS 6系统优化脚本》，因为有时候一台虚拟机已经刷过了优化脚本，但是可能因为别的原因，这台虚拟机暂时搁置了。等过了一段时间之后，突然要用又不知道这台虚拟机是否已经优化过了，而重新使用cobbler刷一次系统又会耗费一定的时间，所以这个检测系统是否刷过优化脚本的shell脚本就诞生了。脚本不是特别准确，但是能针对上次的优化脚本做一个检查，如果已经刷过脚本，就会通过运行该脚本知道系统已经优化过了，可以立即投入使用，避免浪费时间重新再刷一次系统。如果是一个完全重新安装的CentOS 6.x,那结果也可以看出该虚拟机并未优化过，那么执行优化脚本优化一次即可。
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#!/bin/bash
#####################################################################################
#The script is used to check whether the optimize script had been run on CentOS 6.x
#Created by Jerry12356 on May 16th, 2016
#####################################################################################
.
/etc/init
.d
/functions
check_iptables(){
/etc/init
.d
/iptables
status >
/dev/null
2>&1
[ $? -
ne
0 ] && action
"Optimize iptables: "
/bin/true
|| action
"Optimize iptables: "
/bin/false
}
check_selinux(){
selinux_status=`getenforce`
[ $selinux_status ==
'Disabled'
] && action
"Optimize selinux: "
/bin/true
|| action
"Optimize selinux: "
/bin/false
}
check_addusers(){
egrep
"admin|nginx|zabbix"
/etc/passwd
>>
/dev/null
2>&1
[ $? -
eq
0 ] && action
"Add users: "
/bin/true
|| action
"Add users: "
/bin/false
}
check_install(){
rpm -qa|
egrep
"gcc|gcc-c++|openssh-clients|wget|make|cmake|curl|finger|nmap|tcp_wrappers|expect|lrzsz|unzip|zip|xz|ntpdate|lsof|telnet|vim|tree"
>
/dev/null
2>&1
[ $? -
eq
0 ] && action
"Install softwares: "
/bin/true
|| action
"Install softwares: "
/bin/false
}
check_repos(){
[ -d
/etc/yum
.repos.d
/bak
] && action
"Update repos: "
/bin/true
|| action
"Update repos: "
/bin/false
}
check_time(){
date
-R |
grep
+0800 >
/dev/null
2>&1
[ $? -
eq
0 ] && action
"Setting timezone: "
/bin/true
|| action
"Setting timezone: "
/bin/false
crond_num=`
crontab
-l|
grep
ntpdate|
wc
-l`
[ $crond_num -
ge
1 ] && action
"Sync time: "
/bin/true
|| action
"Sync time: "
/bin/false
}
check_services(){
service_num=`chkconfig --list |
grep
3:on|
egrep
"crond|network|rsyslog|sshd"
|
wc
-l`
[ $service_num -
eq
4 ] && action
"Optimize services: "
/bin/true
|| action
"Optimize services: "
/bin/false
}
check_history(){
[ $HISTSIZE -
eq
10000 ] && action
"Setting history: "
/bin/true
|| action
"Setting history: "
/bin/false
}
check_kernel(){
conn_num=`
ulimit
-n`
[ $conn_num -
eq
2097152 ] && action
"Optimize kernel: "
/bin/true
|| action
"Optimize kernel: "
/bin/false
}
check_hostname(){
[ $HOSTNAME !=
'localhost.localdomain'
] && action
"Change hostname: "
/bin/true
|| action
"Change hostname: "
/bin/false
}
check_iptables
check_selinux
check_addusers
check_install
check_repos
check_time
check_services
check_history
check_kernel
check_hostname
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本文转自 jerry1111111 51CTO博客，原文链接：http://blog.51cto.com/jerry12356/1839284，如需转载请自行联系原作者
