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Editor to share with you how to use the Shell script to regularly backup and clear the running system log, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

First, write backup and clear the old log Shell script:

The code is as follows:

#! / bin/sh

# backup eoslog

# author rhao

# date 2008-12-27

# define environment variables

EOS_HOME=/home/eos

SAS_HOME=/home/eos/SAS

# testing primary and secondary nodes

If test-d'/ home/eos/SAS/SAS1_web1'

Then

SAS_LOG_HOME=$SAS_HOME/SAS1_web1/SAS_Domain/bin

Else

SAS_LOG_HOME=$SAS_HOME/SAS2_web1/SAS_Domain/bin

Fi

# define and create a log backup directory

SAS_LOG_BAK_HOME=$EOS_HOME/saslog/

Mkdir-p $SAS_LOG_BAK_HOME

# change directory to EOS log file directory

Cd $SAS_LOG_HOME

# get the current system date

TODAY= `date +% Y% m% d`

# back up the current log

Cp nohup.out $SAS_LOG_BAK_HOME/$TODAY.log

# clear the current log

Touch nohup.null

Cp nohup.null nohup.out-f

Rm nohup.null

# clear the log from seven days ago

For rmfile in `find $SAS_LOG_BAK_HOME-ctime + 7 `

Do / bin/rm-rf $rmfile

Done

Second, add the script to the crontab of the operating system, and add it directly to VI.

The code is as follows:

[eos@xcfwbz1 SAS] $crontab-l

59 23 * / home/eos/SAS/backup_eoslog.sh

It says that the script is executed at 23:59 every day.

Shell script to clear the log (log)

The code is as follows:

#! / bin/bash

LOG_DIR=/var/log

ROOT_UID=0

LINES=50

E_XCD=66

E_NOTROOT=67

If ["$UID"-ne "$ROOT_UID"]

Then

Echo "Must be root to run this script."

Exit $E_NOTROOT

Fi

If [- n "$1"]

Then

Lines=$1

Else

Lines=$LINES

Fi

Cd $LOG_DIR

If [`pwd`! = "$LOG_DIR"]

Then

Echo "Can't change to $LOG_DIR."

Exit $E_XCD

Fi

Tail-$lines messages > mesg.temp

Mv mesg.temp messages

Echo "Logs cleaned up."

Exit 0

The above is all the contents of the article "how to use the Shell script to regularly back up and clear the running system log". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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