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fuller interactive version of backup.db.sh
<source lang="bash">
#!/bin/sh
# @author Greg Rundlett <info@eQuality-Tech.com>
# This is a quick shell script to create a sql dump of your database.
# You may need to adjust the path of mysqldump,
# or sudo apt-get install mysqldump if it doesn't exist
# We'll make it so you can pass the database name as the first parameter # to the script for playbook / cron / non-interactive use# If no parameter is passed, we'll prompt you for the nameDB=$1if [ $# -ne 1 ]; then echo "Here are the current databases on the server" mysql -u root --batch --skip-column-names -e 'show databases;' echo "Enter the name of the database you want to backup" read DBfi# If on a Virtual Machine, use a location that is exported to the host, # so that our backups are accessible even if the virtual machine is no longer accessible.# backupdir=wiki"/vagrant/mediawiki/backups";backupdir="$HOME/backups";
if [ ! -d "$backupdir" ]; then
mkdir -p "$backupdir";
fi
# shell parameter expansion # see http://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html# we'll start with a default backup file named '01' in the sequencebackup="${backupdir}/dump-$(date +%F).$(hostname)-${DB}.01.sql";# and we'll increment the counter in the filename if it already exists# http://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html#Shell-Parameter-Expansion
i=1
filename=$(basename "$backup") # foo.txt(basename is everything after the last slash)extension=${filename##*.} # .txt(filename with the longest matching pattern of *. being deleted)file=${filename%.*} # foo (filename with the shortest matching pattern of .* deleted)file=${file%.*} # repeat the strip to get rid of the counter# file=${filename%.{00..99}.$extension} # foo(filename with the shortest matching pattern of .[01-99].* deleted)
while [ -f $backup ]; do
backup="$backupdir/${file}.${(printf '%.2d' $(( i}+1 ))).${extension}" i=$(( i+1 )) # increments $i # note that i is naked because $(( expression )) is arithmetic expansion in bash
done
if /usr/bin/mysqldump "$DB " > "$backup";then echo "backup created successfully" ls -al "$backup"; echo "A command such as" echo "mysql -u root $DB < $backup" echo "will restore the database from the chosen sql dump file"else echo "ERROR: Something went wrong with the backup" exit 1fi
</source>
