Shell scripts

Convenient shell scripts for everyday use, written in bash, perl, awk, python.

All scripts print a helpful usage message when used with -h or --help

The ./install.sh script will symlink these scripts in your ~/bin directory. It will not overwrite any existing files.

Bash

• bash/bak.sh

  Move or copy files and directories with .bak or .YYYYMMDD suffix

• bash/bell.sh

  Sound the system bell

• bash/capitalize.sh

  Capitalize words in filenames

• bash/col.sh

  Extract the n-th column of stdin

• bash/cp-replace.sh

  Replace regex patterns in filenames

• bash/csv2csv.sh

  Convert CSV to CSV using specified locale

• bash/demoronizer.sh

  Convert non-ascii characters to ascii (rough) equivalents

• bash/dos2unix.sh

  Remove carriage return from files

• bash/ebook-convert.sh

  TODO

• bash/eggtimer.sh

  Countdown from specified minutes and seconds

• bash/extract-audio-from-video.sh

  Extract audio content from video files

• bash/extract-icon-from-platter.sh

  Extract an icon image from a platter of icon images

• bash/find-recent.sh

  Find and sort files by atime/ctime/mtime

• bash/flac2mp3.sh

  Convert FLAC files to MP3 using flac and lame

• bash/gen-indexhtml.sh

  Generate index.html from files and directory trees

• bash/get-checklists.sh

  Get checklists from Code Complete

• bash/git.sh

  Perform repository operations on a tree of Git repositories

• bash/icons2dim.sh

  Resize icon images to have specified width and height

• bash/icons2square.sh

  Pad images with transparency to have equal width and height

• bash/iconv-filenames.sh

  Convert the encoding of filenames (if possible)

• bash/id3tag.sh

  Set id3 v2 tag on mp3 files in the current directory and rename nicely

• bash/ipod2local.sh

  Import mp3 files from ipod to hard disk

• bash/iptables-simple.sh

  Configure a very simple firewall using iptables

• bash/jar-manifest-classpath.sh

  Print the classpath entries of the manifest of JAR files

• bash/java-io-tmpdir.sh

  Print the value of java.io.tmpdir

• bash/lowercase.sh

  Rename files to all lowercase letters

• bash/m4a2mp3.sh

  Convert M4A files to MP3 using faad and bladeenc

• bash/mv-many.sh

  Rename files and directories by editing their names in vim

• bash/mv-replace.sh

  Replace regex patterns in filenames

• bash/my-external-ip.sh

  Find my external IP address

• bash/my-ip.sh

  Print my local IP address

• bash/paths.sh

  Transform the display of path strings

• bash/pdf-pages.sh

  Cut out a range of pages from PDF files

• bash/pwgen.sh

  Generate random alphanumeric passwords

• bash/quote.sh

  Enclose each line of input within quotes

• bash/rip-audiocd.sh

  Copy titles in an audio CD to wav files in the specified directory

• bash/rip-dvd.sh

  Rip a DVD movie into a high quality DIVX file

• bash/save-webpage.sh

  Save a webpage and all the files necessary to display properly

• bash/screenshot.sh

  Take a screenshot of the entire screen or a window

• bash/ssh-authorizeme.sh

  Add a public key to the authorized_keys file on a remote server

• bash/ssh-tunnel-keeper.sh

  Create an ssh rtunnel and try to keep it alive as long as possible

• bash/sys-vitalbackup-Linux.sh

  Backup most vital system files and most relevant system information

• bash/template-html.sh

  Create a standards compliant HTML skeleton

• bash/template-perl.sh

  Generate a Perl script template with a simple argument parser

• bash/template-sh.sh

  Generate a Bash script template with a simple argument parser

• bash/unrar.sh

  Properly unrar files in directories containing spaces in their names

• bash/uppercase.sh

  Rename files to all uppercase letters

• bash/wav2mp3.sh

  Convert WAV files to MP3 using bladeenc or lame

• bash/wma2mp3.sh

  Convert WAV files to MP3 using mplayer, and bladeenc or lame

• bash/words.sh

  Find words in specified files or directories

• bash/wp-config-to-my-cnf.sh

  Create a MySQL my.cnf file from a WordPress configuration file

Perl

• perl/atime.pl

  Print access time of specified files

• perl/base64.pl

  Encode (= default) or decode Base64

• perl/pie.pl

  Apply expression on the content of files, for example s/foo/bar/g

Awk

• awk/avg.awk

  Compute the average of numeric values on stdin

• awk/column.awk

  Columnate lists, imitating the BSD column -t command

• awk/lengths.awk

  Compute and print the lengths of lines on stdin

• awk/max.awk

  Compute the minimum of numeric values on stdin

• awk/min.awk

  Compute the minimum of numeric values on stdin

• awk/sum.awk

  Compute the sum of numeric values on stdin

• awk/var.awk

  Compute the variance of numeric values on stdin

Python

• python/fakedate.py

  Print the current date but with specified values overridden

• python/free.py

  Display amount of free and used memory in the system

• python/iconv.py

  Convert the character encoding of files

• python/paste.py

  Merge corresponding or subsequent lines of files

• python/pp.py

  Pretty-print JSON

• python/pwgen.py

  Generate random passwords

• python/renum.py

  Add numeric prefix to filenames to match the order specified in a list file

• python/seq.py

  Print sequences of numbers, imitating the seq tool

• python/titlecase.py

  Rename files to "titlecased" and "sanitized"

• python/transpose.py

  Convert columns to lines or lines to columns

• python/xpath.py

  Test on an XML file an XPATH expression