sed系列:多命令执行

最新推荐文章于 2024-12-14 21:07:28 发布

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本文通过具体实例介绍了SED命令的基础用法，包括如何使用SED删除指定行、输出特定模式匹配的行及删除空行等内容。

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Syntax:
#sed -e 'command' -e 'command' filename
Note: -e option is optional for sed with single command. sed will execute the each set of command while processing input from the pattern buffer.
让我们先创建示例文件
# cat thegeekstuff.txt
1. Linux - Sysadmin, Scripting etc.
2. Databases - Oracle, mySQL etc.
3. Hardware
4. Security (Firewall, Network, Online Security etc)
5. Storage
6. Cool gadgets and websites
7. Productivity (Too many technologies to explore, not much time available)
8. Website Design
9. Software Development

10.Windows- Sysadmin, reboot etc

例１:删除第１行和第４行
$sed -e '4d' -e '2d' thegeekstuff.txt
1. Linux - Sysadmin, Scripting etc.
3. Hardware
5. Storage
6. Cool gadgets and websites
7. Productivity (Too many technologies to explore, not much time available)
8. Website Design
9. Software Development

10.Windows- Sysadmin, reboot etc.

例２:输出模式匹配１和模式匹配行２
$sed -n -e '/Storage/p' -e /Software/p thegeekstuff.txt
5. Storage
9. Software Development

例３:删除第一行,最后一行和空行
$sed -e '1d' -e '$d' '/^$/d' thegeekstuff.txt
sed: can't read /^$/d: No such file or directory
2. Databases - Oracle, mySQL etc.
3. Hardware
4. Security (Firewall, Network, Online Security etc)
5. Storage
6. Cool gadgets and websites
7. Productivity (Too many technologies to explore, not much time available)
8. Website Design
9. Software Development
$sed '
> 1d
> $d
> /^$/d
> ' thegeekstuff.txt
2. Databases - Oracle, mySQL etc.
3. Hardware
4. Security (Firewall, Network, Online Security etc)
5. Storage
6. Cool gadgets and websites
7. Productivity (Too many technologies to explore, not much time available)
8. Website Design
9. Software Development
$