包含标签 tr articles

用Linux命令行生成随机密码的十种方法

2011年的时候我写过一篇日志 利用pwgen、mkpasswd、tr自动更改密码 ,今天在51cto上翻译的与其相关的一篇国外文章,名字就是本文的标题。当然方法上并不比我之前总结的高明,这里也摘抄下具体实现语句,算是做一个回归吧。 1、这种方法使用SHA算法来加密日期,并输出结果的前……

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linux下删除空行的几种方法

在查看linux下的配置文件时,为了便于一目了然的查看,经常会删除空行和#头的行。而linux在删除空行的方法很多,grep、sed、awk、tr等工具都能实现。现总结如下: 1、grep 1grep -v '^$' file 2、sed 1sed '/^$/d' file 或 sed -n '/./p' file 3、awk 1awk '/./ {print}' file 或 awk '{if($0!=" ") print}' 4、tr 1tr -s "n" 除此之外,vim也……

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利用pwgen、mkpasswd、tr自动更改密码

pwgen和mkpasswd都有自己动生成密码文件的功能。而且mkpasswd可以自动更改密码到指定用户。两者的区别如下: 1、pwgen的用法 1Usage: pwgen [ OPTIONS ] [ pw_length ] [ num_pw ] 2Options supported by pwgen: 3 -c or --capitalize 4 Include at least one capital letter in the password 5 -A or --no-capitalize 6 Don't include capital letters in the password 7 -n or --numerals 8 Include at least one number in the password 9 -0 or --no-numerals 10 Don't include numbers in the password 11 -y or --symbols……

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