Example Analysis of crontab Quick comment and revocation comment

Crontab quick comments and withdraw comments example analysis, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

We know that in general, writing crontab requires editing using a vi editor. With the vi editor, you can easily add the comment symbol'#'to the front of each line, or you can easily use the vi editor to remove the commented'# 'from each line.

Batch Quick comment and undo comment:

First use crontab-e to edit crontab

$crontab-e

Then use the following editing command from vi

:% s / ^ / # /

You can comment out the scheduled tasks by adding a'#'in front of them.

Similarly, after some operations are completed, edit the crontab first.

$crontab-e

Use the following editing commands

:% s / ^ # /

You can talk about the scheduled tasks of all the comments last time and cancel them all.

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