本文共 3548 字，大约阅读时间需要 11 分钟。
以下是在部署OpenStack以及使用Linux过程中摘录的一些较为常用的命令行或shell脚本，仅供参考。
1.杀死所有存在的僵尸进程
| 1 2 | ps -ef | grep defunc | grep - v grep | awk '{print $3}' | xargs kill -9 #pkill dnsmasq |
2.去掉配置文件中的#符号和空白行
| 1 2 3 4 5 6 7 8 9 | cat > /root/delsc .sh <<eof #!/bin/bash # delete all spaces and comments of specialized file, using with filename [[ "\$1" == '' ]] && echo "delete all spaces and comments of specialized file, using with \$@ filename" && exit 1 grep - v \ # \$1 | grep -v ^$ eof cat /root/delsc .sh chmod +x /root/delsc .sh ln -s /root/delsc .sh /usr/local/bin/delsc |
3.CentOS7安装vmtools
| 1 2 3 4 5 6 7 8 9 | # mount /dev/cdrom /mnt/ # cp /mnt/VMwareTools-9.4.10-2092844.tar.gz /tmp/ # cd /tmp/ # tar zxf VMwareTools-9.4.10-2092844.tar.gz # /tmp/vmware-tools-distrib/vmware-install.pl yum install open -vm-tools -y systemctl enable vmtoolsd.service systemctl start vmtoolsd.service systemctl status vmtoolsd.service |
4.修改Linux系统时区
| 1 2 3 4 | mv /etc/localtime /etc/localtime ~ ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime chown -h --reference= /etc/localtime ~ /etc/localtime chcon -h --reference= /etc/localtime ~ /etc/localtime |
5.中国大陆常用时间服务器列表
| 1 2 3 4 5 6 7 | cat > /etc/ntp .conf <<eof server 2.cn.pool.ntp.org iburst server 3.asia.pool.ntp.org iburst server 0.asia.pool.ntp.org iburst restrict -4 default kod notrap nomodify restrict -6 default kod notrap nomodify eof |
6.配置时间同步
| 1 2 3 4 5 6 7 8 9 10 11 12 13 | rpm -qa | grep ntp || yum install -y ntp ntpdate -u pool.ntp.org || ntpdate -u time .nist.gov || ntpdate -u time -nw.nist.gov date cat >> /etc/rc . local <<EOF ntpdate -u pool.ntp.org || ntpdate -u time .nist.gov || ntpdate -u time -nw.nist.gov hwclock -w EOF # Recommoned do touch /etc/cron .daily /ntpdate cat >> /etc/cron .daily /ntpdate <<EOF ntpdate -u pool.ntp.org || ntpdate -u time .nist.gov || ntpdate -u time -nw.nist.gov hwclock -w EOF |
7.对配置文件更改前先备份配置文件
| 1 2 3 4 5 | operationfile= /etc/keystone/keystone .conf bakoperationfile=$operationfile$( date +-%F-%H-%M-%S) "~" cp $operationfile $bakoperationfile chown -R --reference=$operationfile $bakoperationfile chcon -R --reference=$operationfile $bakoperationfile |
8.创建计划任务
| 1 | ( crontab -l -u keystone 2>&1 | grep -q token_flush) || echo '@hourly /usr/bin/keystone-manage token_flush >/var/log/keystone/keystone-tokenflush.log 2>&1' >> /var/spool/cron/keystone |
9.不切换用户但以此用户的身份执行命令
| 1 | su -s /bin/sh -c "glance-manage db_sync" glance |
10.获取路由IP
| 1 | ip=$( ifconfig `route | grep default | awk '{print $8}' ` | grep inet | grep - v inet6 | awk '{print $2}' ) |
11.判断CPU是否支持虚拟化
| 1 2 3 4 5 6 7 8 9 | if [[ $( egrep -c '(vmx|svm)' /proc/cpuinfo ) == 0 ]]; then defaultnum=` grep -n "^\[libvirt\]$" $operationfile | awk -F ':' '{print $1}' ` sedoperation=$defaultnum "a" sed -i "$sedoperation virt_type = qemu" $operationfile else defaultnum=` grep -n "^\[libvirt\]$" $operationfile | awk -F ':' '{print $1}' ` sedoperation=$defaultnum "a" sed -i "$sedoperation virt_type = kvm" $operationfile fi |
12.获取指定网卡名所对应的IP地址
| 1 2 | ext_ens=ens160 local_ip=$( ifconfig `route | grep $ext_ens | awk '{print $8}' ` | grep inet | grep - v inet6 | awk '{print $2}' ) |
13.查找并删除文件
| 1 | find /tmp -name core - type f -print0 | xargs -0 /bin/rm -f |
14.查找并列出文件类型
| 1 | find . - type f - exec file '{}' \; |
15.查找大于1GB以上的文件，并列出
| 1 | find / -size +1000M - exec ls -alh '{}' \; |
16.测试磁盘性能
| 1 | time dd if = /dev/zero of= /tmp/testfile bs=4k count=80000 |
17.find查找文件大小大于10MB的文件，并find排除某些目录
| 1 | find / -not \( -path /var/lib/docker -prune -o -path /proc -prune \) - type f -size +10M |
--end--
本文转自 urey_pp 51CTO博客，原文链接：http://blog.51cto.com/dgd2010/1584952，如需转载请自行联系原作者