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/add-stub-pl.sh

Insert a script header after the first line of a perl script
bash/add-stub-sh.sh

Insert a script header after the first line of a shell script
bash/add-usage-sh.sh

Add a usage() function after the first blank line of a shell script
bash/alert.sh

Sound the system bell
bash/backup.sh

Archive files under BASE/sources/{daily,weekly,monthly}
bash/bak.sh

Move or copy files and directories with .bak or .YYYYMMDD suffix
bash/bzr.sh

Perform repository operations on a tree of bzr repositories
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/download-lj.sh

Download Linux Journal PDFs from your digital subscription
bash/download-lm.sh

Download Linux Magazine PDFs from your digital subscription
bash/eggtimer.sh

Countdown from specified minutes and seconds
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-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/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-flash-linux.sh

Copy a flash movie (youtube.com, etc) saved by a browser in /private
bash/save-flash-mac.sh

Copy a flash movie (youtube.com, etc) saved by a browser in /private
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/svn.sh

Perform repository operations on a tree of svn repositories
bash/svnadmin.sh

Subversion repository tool based on svnadmin
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/FreeBSD.pl

A package manager for FreeBSD emulating some of the functionality of apt-get
perl/atime.pl

Print access time of specified files
perl/base64.pl

Encode (= default) or decode Base64
perl/dbi-info.pl

Print the list of available DBI drivers and data sources
perl/geoip-lookup.pl

Find the country of a hostname or IP address using Geo::IPfree
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/col.awk

Print the selected column 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/reorder.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

onceclick/shellscripts

Shell scripts

Bash

Perl

Awk

Python