Browsing Spanish translation

4750.

The <application>tar</application> utility creates one archive file out of many files or directories. <application>tar</application> can also filter the files through compression utilities, thus reducing the size of the archive file.

4753.

#!/bin/bash
####################################
#
# Backup to NFS mount script.
#
####################################

# What to backup.
backup_files="/home /var/spool/mail /etc /root /boot /opt"

# Where to backup to.
dest="/mnt/backup"

# Create archive filename.
day=$(date +%A)
hostname=$(hostname -s)
archive_file="$hostname-$day.tgz"

# Print start status message.
echo "Backing up $backup_files to $dest/$archive_file"
date
echo

# Backup the files using tar.
tar czf $dest/$archive_file $backup_files

# Print end status message.
echo
echo "Backup finished"
date

# Long listing of files in $dest to check file sizes.
ls -lh $dest

4765.

This is a simple example of a backup shell script; however there are many options that can be included in such a script. See <xref linkend="backup-shellscript-references"/> for links to resources providing more in-depth shell scripting information.

4768.

The simplest way of executing the above backup script is to copy and paste the contents into a file. <filename>backup.sh</filename> for example. The file must be made executable:

4769.

chmod u+x backup.sh

4770.

Then from a terminal prompt:

4771.

sudo ./backup.sh

4822.

#!/bin/bash
####################################
#
# Backup to NFS mount script with
# grandfather-father-son rotation.
#
####################################

# What to backup.
backup_files="/home /var/spool/mail /etc /root /boot /opt"

# Where to backup to.
dest="/mnt/backup"

# Setup variables for the archive filename.
day=$(date +%A)
hostname=$(hostname -s)

# Find which week of the month 1-4 it is.
day_num=$(date +%-d)
if (( $day_num &lt;= 7 )); then
week_file="$hostname-week1.tgz"
elif (( $day_num &gt; 7 &amp;&amp; $day_num &lt;= 14 )); then
week_file="$hostname-week2.tgz"
elif (( $day_num &gt; 14 &amp;&amp; $day_num &lt;= 21 )); then
week_file="$hostname-week3.tgz"
elif (( $day_num &gt; 21 &amp;&amp; $day_num &lt; 32 )); then
week_file="$hostname-week4.tgz"
fi

# Find if the Month is odd or even.
month_num=$(date +%m)
month=$(expr $month_num % 2)
if [ $month -eq 0 ]; then
month_file="$hostname-month2.tgz"
else
month_file="$hostname-month1.tgz"
fi

# Create archive filename.
if [ $day_num == 1 ]; then
[tab]archive_file=$month_file
elif [ $day != "Saturday" ]; then
archive_file="$hostname-$day.tgz"
else
[tab]archive_file=$week_file
fi

# Print start status message.
echo "Backing up $backup_files to $dest/$archive_file"
date
echo

# Backup the files using tar.
tar czf $dest/$archive_file $backup_files

# Print end status message.
echo
echo "Backup finished"
date

# Long listing of files in $dest to check file sizes.
ls -lh $dest/

4827.

A tape drive attached to the server can be used instead of an NFS share. Using a tape drive simplifies archive rotation, and makes taking the media off-site easier as well.

4848.

If using MySQL or PostgreSQL as your database, you should already have the services available. <application>Bacula</application> will not install them for you.