脚本分享-服务器初始化检查

很简单的脚本(dbc.sh),供参考参考

#!/bin/bash

# ########################################################################
# License: GPL
# Authors:
# ########################################################################

usage() {
cat << EOF
新手指南:
1.  用于DBA数据库初始化检查
2.  脚本必须用root权限执行
sudo $(basename $0)
3.  被检查的系统必须是CentOS

EOF
#
# 判断sudo权限
#
if [ $USER != "root" ]; then
echo "请用root用户执行"
exit
fi

#
# ops 安装的系统是 CentOS
#
if [ -e "/usr/bin/lsb_release" ]; then
rele=$(lsb_release -r|gawk '{print $2}')
if [ "$rele" != '6.2' ]; then
echo "# Current system is not CentOS 6.2 "
exit
fi
else
echo "# No lsb_release modules are available."
echo "$ sudo yum install lsb"
exit
fi
#
read -p "Are you sure (yes/no): " sure
if [ "$sure" != 'yes' ]; then
echo "# The script is exist."
exit
fi


}
# call
usage

setup_deppack() {
cat << EOF

#==============================================================================
# 安装依赖包:
#   mysql-mmm
#   git
#==============================================================================
EOF
# 清除本地的rpm包,更新本地缓存
yum clean all
yum makecache
# 安装mysql-mmm依赖
# 注意,参数选项不能写在一起(probably due to merging: -yq != -y -q)
yum -y -q install coreutils iproute perl-Algorithm-Diff perl-Class-Singleton perl-DBD-MySQL perl-DBI perl-Log-Log4perl perl-Net-ARP perl-Path-Class perl-Proc-Daemon perl-Time-HiRes
# 安装git
yum -y -q install git
}
# call
setup_deppack
sleep 1

setup_system() {
cat << EOF

#==============================================================================
# 系统配置
#   ulimit
#   sysctl
#==============================================================================
EOF
#set ulimit
openfiles=$(ulimit -n)
maxusers=$(ulimit -u)
if [ "$openfiles" -lt "60000" ]; then
echo "*               soft    nofile  65536" >> /etc/security/limits.conf
echo "*               hard    nofile  65536" >> /etc/security/limits.conf
if [ "$maxusers" -lt "60000" ]; then
echo "*          soft    nproc     65536" >> /etc/security/limits.d/90-nproc.conf
fi
fi
#set sysctl
/sbin/sysctl -w vm.swappiness=0 > /dev/null

#write sysctl.conf
echo "vm.swappiness = 0" >> /etc/sysctl.conf

#set secure
#sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
#grep 'SELINUX' /etc/selinux/config
}
# call
setup_system
sleep 1

setup_display() {
cat << EOF

#==============================================================================
# The results show
#==============================================================================
EOF
#
echo "open files: "$(ulimit -n)
echo "max user processes: "$(ulimit -u)
echo $(/sbin/sysctl vm.swappiness)
}
# call
setup_display