Onliner Batch Rename Files with Bash

Pierre — Sat, 13 Dec 2008 12:39:35 +0000

Because I’m fed of searching for this kind of useful command :

$ for F in *; do E=${F:(-4)}; B=${F/$E/}; mv $F 'Wonderful.Serial.FileName.S03E'$B.'VOSTFR.HDTV.XViD.GKS'$E; done

Explanations :
E = ${F:(-4)} extracts the file extension.

B = ${F/$E/} returns the original filename without extension.

These two variables are then used to build the new filename

[EDIT]

Another one, using sed and regular expressions :

$ for A in *.avi; do mv "$A" `echo $A | sed -r 's/^Name To Remove ([0-9](-[0-9]+)?)\.avi$/\1.avi/'`; done

Were we build a simple “mv” command with the original filename ($A) and a new filename by catching the output of echo $A | sed enclosing it with backquotes (`).

sed -r allows to use extended regular expressions.

s/you/me/ is the sed command to Subsitute you by me.

s/^Name To Remove ([0-9](-[0-9]+)?)\.avi$/\1.avi/

We match filenames like :

Name To Remove 123.avi (as many spaces as you want between the textual part of the name and the file number)
Name To Remove 123-456.avi

We catch the subexpression between parenthesis (123 or 123-456 in this poor example) and we use it to build the new filename (thanks to ”\1” in the third part of the sed command.)

Firebird backup script

Pierre — Thu, 25 Sep 2008 09:29:59 +0000

This is my first released backup script for Firebird RDBMS. It automagically search for all Firebird databases from a central directory, uses gfix to validate them, then backup + gzip them to a central backup directory keeping only 5 last successful backups.

It may be used as a cron script to automate Firebird databases backup.

#!/usr/bin/env bash
#
#   Validate and Backup Firebird databases using Firebird
# standard tools
#
#   You can adjust FB_ROOT, FB_BIN, FB_DATA, Fb_BACKUP and 
# BACKUP_COUNT variables to fit your own requirements. 
# For instance, if you use an official package of Firebird for your
# ditribution, you may have to change FB_ROOT to /usr/bin.
#
# The contents of this file are subject to the Initial 
# Developer's Public License Version 1.0 (the "License"); 
# you may not use this file except in compliance with the 
# License. You may obtain a copy of the License from
# the Firebird Project website, at 
# http://www.firebirdsql.org/index.php?op=doc&id=idpl.
#
# Software distributed under the License is distributed 
# on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, 
# either express or implied. See the License for the 
# specific language governing rights and limitations under 
# the License.
#
# The Original Code is licenced under IDPL
#
# The Initial Developer of the Original Code is 
#   Pierre Yager (pierre@levosgien.net).
#
# Portions created by ______________________
# are Copyright (C) ______ _________________.
#
# All Rights Reserved.
#
# Contributor(s): _________________________.
#
 
FB_ROOT=/opt/firebird
FB_BIN=${FB_ROOT}/bin
FB_DATA=/var/firebird
FB_BACKUP=backup
BACKUP_COUNT=5
 
# You shouldn't have to make any changes below
 
if [ ! `id -u` = 0 ]
then
  echo You are not root...
  exit 67
fi
 
# Loads the ISC_USER and ISC_PASSWORD environment variables
source ${FB_ROOT}/SYSDBA.password
 
export ISC_USER
export ISC_PASSWORD
 
#  Returns the filename without extension, whatever the 
#+ extension is...
function namename()
{
  local name=${1##*/}
  local name0="${name%.*}"
  echo "${name0:-$name}"
}
 
# Cleanup old backup files
function cleanup()
{
  local PREFIX=$1
 
  # list files by time in reverse order 
  local FILES=`ls -rt ${FB_BACKUP}/${PREFIX}*.fbk.gz`
 
  # count the previous files list
  local FILES_COUNT=`ls -lrt ${FB_BACKUP}/${PREFIX}*.fbk.gz | wc -l`
 
  if [ $FILES_COUNT -gt $BACKUP_COUNT ]
  then
    # Iterate the files list
    for F in $FILES
    do
      if [ $FILES_COUNT -gt $BACKUP_COUNT ]
      then
        #  And remove first files as soon as we have only 
        #+ BACKUP_COUNT files remaining
        rm $F
        FILES_COUNT=$((FILES_COUNT - 1))
      else
        break
      fi
    done
  fi
}
 
# Uses gfix to validates the database
function validate()
{
  ${FB_BIN}/gfix -validate -full $1
  echo $?
}
 
# Uses gbak to backup the database then compress it...
function backup()
{
  local DIR=${1%/*}
  local DB=`namename $F`
  local TS=`date +"%Y%m%d_%H%M%S"`
  local BACKUP=${FB_BACKUP}/${DIR}_${DB}_${TS}.fbk
  ${FB_BIN}/gbak -b $1 $BACKUP
  gzip $BACKUP
  cleanup ${DIR}_${DB}
}
 
pushd ${FB_DATA} > /dev/null
 
if [ ! -d ${FB_BACKUP} ]
then
  mkdir ${FB_BACKUP}
fi
 
#  Avoid */*.fdb to be expanded if there are no files in the 
#+ databases repository
shopt -s nullglob
 
for F in */*.fdb
do
  if [ `validate $F` = 0 ]
  then
    # Only backup valid databases
    backup $F
 
    #  Future enhancements : write a message to stderr so that
    #+ cron can send a mail to the DBA when databases are not 
    #+ valid...
  fi
done
 
popd > /dev/null

Hope this will be useful. You can also download the script

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Onliner Batch Rename Files with Bash

Firebird backup script