Linux awk command bulk shutdown system boot-up service

After installing a new system, some boot-start services need to be shut down in order to simplify the system.

The snail uses the basic commands of grep and awk to operate.

As a server, the service that needs to be started in the new system is probably the following

Crond Network sshd Rsyslog

Viewing runlevel 3 boot-up services

Chkconfig--list|grep 3:on

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Step 1: Collect the service name

Use grep to filter out the 3:on service, then exclude the four options for Crond network sshd rsyslog, then utility awk outputs the first column of content

Chkconfig--list|grep 3:on|grep-ev "Network|sshd|crond|rsyslog" |awk ' {print $} '

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Here's a practical awk-based operation, which describes one of awk's parameters-F after adding a field delimiter to use after using fields like $ $ $ and so on to filter if you don't use the-F default delimiter as a space, the above operation directly uses the contents of the output after

The whole row is the first column.

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Step 2: Combine the captured data into a command and bash

Chkconfig--list|grep 3:on|grep-ev "Network|sshd|crond|rsyslog" |awk ' {print $} ' |awk ' {print ' chkconfig ' $ ' off '} ' |bas H

It is important to note that the trailing and off of the chkconfig must be preceded by a space that is combined with the awk variable and sent to bash for processing

The operation results are as follows

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It's just a simple practical way to use Awk's other powerful features and continue writing ...

This article is from the "relentless snail" blog, please be sure to keep this source http://songxiao.blog.51cto.com/12183698/1961289

Linux awk command bulk shutdown system boot-up service