Linux shell script to adjust the task plan

Linux shell script to adjust the task plan

There are 2 scripts to run the task plan every day

Dts_rsync.sh downloads online backup SQL files

Dts_input.sh is responsible for importing the downloaded backup file to the local Mysql

One problem is that the backup file download time is not fixed. In the past, the download was completed at a.m., and now it can be completed at a.m.. It may be added later.

The download log is as follows:

0:10:01 Start Transmission

7:19:35 Transmission completed

The task plan is as follows:

# Synchronous backup of express

10 0 ***/opt/dts_rsync.sh &

# Importing backup files

01 7 ***/opt/dts_input.sh &

All you need to do is extract the download completion time, and then increase the hours in the backup file import time by one hour.

The shell cannot directly edit the task plan.

You can write the task plan content to a txt file, and then use the command to overwrite the txt content to the task plan

The command is as follows:

/Usr/bin/crontab/opt/cron.txt

The complete shell script cron is as follows:

#! /Bin/bash

Echo "#######################">/opt/cron. log

# Record execution time

Statime = 'date + % Y-% m-% d "" % H: % M: % s'

Echo "$ statime">/opt/cron. log

# Scheduled task start time, extracted by hour

A = 'cat/opt/cron.txt | grep dts_input.sh | awk '{print $2 }''

# Transfer completion time, extraction hour

B = 'Tail-1/tmp/dts_message.log | awk '{print $2}' | cut-d ":"-f 1'

Echo "task scheduled start time $ a">/opt/cron. log

Echo "transfer completion time $ B">/opt/cron. log

# Determine whether the transfer completion time is greater than or equal to the scheduled time of the task

If [$ B-ge $ a]; then

# Increase by 1 hour

C = '/usr/bin/expr $ a + 1'

# Modifying the task scheduler File

/Bin/sed-I "s/$ a/$ c/g"/opt/cron.txt

# Overwrite the task plan

/Usr/bin/crontab/opt/cron.txt

Echo "task Scheduled Start Time status ERROR, changed to $ c">/opt/cron. log

Else

Echo "The task plan start time status is OK, and the hour is $ a">/opt/cron. log

Fi

The contents of cron.txt are as follows:

# Synchronous backup of express

10 0 ***/opt/dts_rsync.sh &

# Importing backup files

01 7 ***/opt/dts_input.sh &

# Check the download time

01 */1 ***/opt/cron. sh

# Clearing log records every Sunday

01 23 ** 0/opt/clean_log.sh

This article permanently updates the link address: