PHPer需要用的shell常用命令(收藏)
码农天地 -前言
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使用Linux shell是一些程序员每天的基本工作,但我们经常会忘记一些有用的shell命令和技巧。当然,命令我能记住,但我不敢说能记得如何用它执行某个特定任务。需要注意一点的是,有些用法需要在你的Linux系统里安装额外的软件。下面话不多说了,来看看详细的内容吧。
检查远程端口是否对bash开放:
`echo >/dev/tcp/8.8.8.8/53 && echo "open"`
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让进程转入后台:
`Ctrl + z`
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产生随机的十六进制数,其中n是字符数:
`openssl rand -hex n`
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在当前shell里执行一个文件里的命令:
`source /home/user/file.name`
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截取前5个字符:
`${variable:0:5}`
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SSH debug 模式:
`ssh -vvv user@ip_address`
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SSH with pem key:
`ssh user@ip_address -i key.pem`
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用wget抓取完整的网站目录结构,存放到本地目录中:
`wget -r --no-parent --reject "index.html*" http://hostname/ -P /home/user/dirs`
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一次创建多个目录:
`mkdir -p /home/user/{test,test1,test2}`
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列出包括子进程的进程树:
`ps axwef`
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创建 war 文件:
`jar -cvf name.war file`
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测试硬盘写入速度:
`dd if=/dev/zero of=/tmp/output.img bs=8k count=256k; rm -rf /tmp/output.img`
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测试硬盘读取速度:
`hdparm -Tt /dev/sda`
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获取文本的md5 hash:
`echo -n "text" | md5sum`
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用”=”打印出横线:全选复制放进笔记
php介绍
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