question

Periodically pack a backup log

introduce

You are the server administrator of the experiment building, and you need to back up the log files in the /var/log directory every day. After the backup is packed and compressed for a long time, the file name is stored in the format of the year-month-day.Tar.gz. For example, the file backed up in November 1, 2017 is 2017-11-01.tar.gz, and the files after the backup are stored in the /home/shiyanlou/backup directory.

Note that you need to use the method of incremental backup of the tar command to make a backup.

target

  1. Add planning tasks for shiyanlou users
  1. Every day at 3 a.m., back up the /var/log directory to the /home/shiyanlou/backup/year-month-day.Tar.gz file, and note that it is an incremental backup.
  1. Backup file naming format is year-month-day.Tar.gz
  1. Write to crontab with a command, do not write the script

    Hint

Crontab sets a tar command for an incremental backup of the specified time.

Knowledge point

Date formatted output string
Crontab set planning tasks
Tar command incremental backup mode

keypoint

0 3 * tar -cvf /home/shiyanlou/backup/$(date +\%Y-\%m-\%d).tar.gz -g /var/log

  • tar.gz
  • 0 3
  • \%Y\%m\%d\%H\%M\%S

  • how to start cron

    1
    2
    sudo service rsyslog start
    sudo cron -f &

  • check whether cron is started

    1
    2
    3
    ps aux|grep cron
    or
    pgrep cron

  • edit

    1
    crontab -e

  • list

    1
    crontab -l

  • remove

    1
    crontab -r