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In-Depth Series: Bash Scripting

  • Number of episodes: 59
  • Open/closed: open
  • Date of earliest show: 2010-03-24
  • Date of latest show: 2023-08-23
  • Series RSS feeds: ogg, spx, mp3
This is an open series in which Hacker Public Radio Listeners can share their Bash scripting knowledge and experience with the community. General programming topics and Bash commands are explored along with some tutorials for the complete novice.

hpr3928 :: RE: Klaatu. hosted by Some Guy On The Internet

2023-08-23. 00:24:27. Explicit.
Bash scripting, bash commands, bash_aliases.

Sgoti confuses everyone with bash nonsense.

Listen in ogg, spx, or mp3 format.

hpr3882 :: Alternatives to the cd command hosted by Klaatu

2023-06-20. 00:10:32. Clean.
bash, linux.

Navigate your filesystem without cd

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hpr3811 :: mkfifo and named pipes hosted by Klaatu

2023-03-13. 00:11:18. Clean.
pipe, fifo, mkfifo, Linux, shell.

Have you ever named a pipe? If not, this is the episode you've been waiting for.

Listen in ogg, spx, or mp3 format.

hpr3722 :: Bash snippet - plurals in messages hosted by Dave Morriss

2022-11-08. 00:08:33. Explicit.
Bash, plural, ngettext.

How to use English singular and plural words in messages

Listen in ogg, spx, or mp3 format.

hpr3713 :: Bash snippet - short-circuit evaluation in Bash Boolean expressions hosted by Dave Morriss

2022-10-26. 00:16:40. Explicit.
Bash, Boolean expression, short-circuit evaluation.

Found I could do this in Bash, so wanted to share!

Listen in ogg, spx, or mp3 format.

hpr3625 :: Shell Tips and Snippets - Collaborative Effort hosted by Carl

2022-06-24. 00:20:25. Clean.
shell.

Carl and special guests provide some shell tips and examples.

Listen in ogg, spx, or mp3 format.

hpr3551 :: Bash snippet - some possibly helpful hints hosted by Dave Morriss

2022-03-14. 00:24:35. Explicit.
Bash, eval, mapfile, environment variables.

Using 'eval', 'mapfile' and environment variables

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hpr3413 :: Bash snippet - using coproc with SQLite hosted by Dave Morriss

2021-09-01. 00:45:38. Explicit.
Bash, coproc, subshell, coprocess, pipe, file descriptor.

Sending multiple queries to a running instance of sqlite3

Listen in ogg, spx, or mp3 format.

hpr3071 :: Bash snippet - quotes inside quoted strings hosted by Dave Morriss

2020-05-11. 00:13:19. Explicit.
Bash, quotes.

How to add quotes to quoted strings in Bash

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hpr3013 :: Bash Tips - 21 hosted by Dave Morriss

2020-02-19. 00:41:37. Explicit.
Bash, variable, environment, environment variable.

Environment variables

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hpr2877 :: Using Zenity with Pdmenu hosted by Dave Morriss

2019-08-13. 00:22:38. Explicit.
zenity, Bash scripting, pdmenu, GTK+.

Zenity is a rather cool program that will display GTK+ dialogs from a script

Listen in ogg, spx, or mp3 format.

hpr2807 :: Are bash local variables local? hosted by clacke

2019-05-07. 00:11:01. Clean.
bash, perl, scope, dynamic scope, lexical scope.

A lesson on dynamic scope vs lexical scope

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hpr2793 :: bash coproc: the future (2009) is here hosted by clacke

2019-04-17. 00:21:16. Clean.
bash, coproc, subshell.

clacke discovers bash's coproc keyword and explains some toy examples

Listen in ogg, spx, or mp3 format.

hpr2756 :: Bash Tips - 20 hosted by Dave Morriss

2019-02-25. 00:32:35. Explicit.
Bash, array, delete, positional parameters.

Deleting arrays; positional and special parameters in Bash

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hpr2739 :: Bash Tips - 19 hosted by Dave Morriss

2019-01-31. 00:25:53. Explicit.
Bash, array, declare, typeset, local, readonly, read, mapfile, readarray.

Arrays in Bash (part 4)

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hpr2736 :: Response to show 2720 hosted by Dave Morriss

2019-01-28. 00:18:24. Explicit.
Bash, ShellCheck.

Some suggestions on how to improve a Bash script

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hpr2729 :: Bash Tips - 18 hosted by Dave Morriss

2019-01-17. 00:31:38. Explicit.
Bash, array, indexed array, associative array, parameter expansion.

Arrays in Bash (part 3)

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hpr2719 :: Bash Tips - 17 hosted by Dave Morriss

2019-01-03. 00:34:16. Explicit.
Bash, array, indexed array, associative array.

Arrays in Bash (part 2)

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hpr2709 :: Bash Tips - 16 hosted by Dave Morriss

2018-12-20. 00:24:00. Explicit.
Bash, array, indexed array, associative array.

Arrays in Bash (part 1)

Listen in ogg, spx, or mp3 format.

hpr2699 :: Bash Tips - 15 hosted by Dave Morriss

2018-12-06. 00:29:54. Explicit.
Bash, loop, ls, pipe, pipeline, find, extglob.

Some of the pitfalls when using loops in Bash

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hpr2689 :: Bash Tips - 14 hosted by Dave Morriss

2018-11-22. 00:28:08. Explicit.
Bash, loop, for, break, continue.

More about loops - the 'for' loop, 'break' and 'continue'

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hpr2679 :: Extra ancillary Bash tips - 13 hosted by Dave Morriss

2018-11-08. 00:36:42. Explicit.
Bash, extended test, regular expression, capture group, BASH_REMATCH, back reference.

Making decisions in Bash (part 5)

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hpr2669 :: Additional ancillary Bash tips - 12 hosted by Dave Morriss

2018-10-25. 00:28:22. Explicit.
Bash, test, regular expression.

Making decisions in Bash (part 4)

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hpr2659 :: Further ancillary Bash tips - 11 hosted by Dave Morriss

2018-10-11. 00:28:22. Explicit.
Bash, test, conditional expression, string comparison, pattern.

Making decisions in Bash (part 3)

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hpr2649 :: More ancillary Bash tips - 10 hosted by Dave Morriss

2018-09-27. 00:22:52. Explicit.
Bash, test, while, until, if, case.

Making decisions in Bash (part 2)

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hpr2639 :: Some ancillary Bash tips - 9 hosted by Dave Morriss

2018-09-13. 00:21:45. Explicit.
Bash, test, true, false.

Making decisions in Bash (part 1)

Listen in ogg, spx, or mp3 format.

hpr2496 :: Making a Raspberry Pi inventory hosted by Dave Morriss

2018-02-26. 00:11:10. Explicit.
Raspberry Pi, RPi.

How to collect identifying information about RPi devices

Listen in ogg, spx, or mp3 format.

hpr2483 :: Useful Bash functions - part 4 hosted by Dave Morriss

2018-02-07. 00:39:46. Explicit.
coding, Bash, script, function.

A Bash function for parsing lists of numbers and ranges

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hpr2469 :: A flight itinerary in Bash hosted by Dave Morriss

2018-01-18. 00:17:45. Explicit.
Bash, date, ISO 8601, epoch.

Working out dates and times in a Bash script

Listen in ogg, spx, or mp3 format.

hpr2448 :: Useful Bash functions - part 3 hosted by Dave Morriss

2017-12-20. 00:33:53. Explicit.
coding, Bash, script, function.

A few more possibly useful Bash functions are discussed

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hpr2349 :: Customizing my bash prompt hosted by Windigo

2017-08-03. 00:24:12. Explicit.
bash, command line, configuration, terminal.

A detailed look into how, and why, to customize a bash prompt.

Listen in ogg, spx, or mp3 format.

hpr2317 :: Bash snippet - extglob and scp hosted by Dave Morriss

2017-06-20. 00:28:27. Explicit.
Bash, shopt, filename expansion, scp, rsync.

How does scp manage extended glob patterns?

Listen in ogg, spx, or mp3 format.

hpr2302 :: Bash snippet - nullglob hosted by Dave Morriss

2017-05-30. 00:07:08. Explicit.
Bash, shopt, nullglob, filename expansion.

After learning about the nullglob option I have started to use it

Listen in ogg, spx, or mp3 format.

hpr2293 :: More supplementary Bash tips hosted by Dave Morriss

2017-05-17. 00:38:25. Explicit.
Bash, expansion, filename expansion, extglob, extended pattern matching.

Finishing off the subject of expansion in Bash (part 2)

Listen in ogg, spx, or mp3 format.

hpr2278 :: Some supplementary Bash tips hosted by Dave Morriss

2017-04-26. 00:39:35. Explicit.
Bash, expansion, pathname expansion, shopt.

Finishing off the subject of expansion in Bash (part 1)

Listen in ogg, spx, or mp3 format.

hpr2135 :: Audio speedup script hosted by Dave Morriss

2016-10-07. 00:27:59. Explicit.
bash, sox, speed.

I want to speed up some of my podcasts and truncate silence in them too so I wrote a script to do it

Listen in ogg, spx, or mp3 format.

hpr2096 :: Useful Bash functions - part 2 hosted by Dave Morriss

2016-08-15. 00:23:21. Explicit.
coding, Bash, script, function.

The further development of a Bash function that may be of use in your scripts

Listen in ogg, spx, or mp3 format.

hpr2045 :: Some other Bash tips hosted by Dave Morriss

2016-06-03. 00:55:53. Explicit.
Bash, expansion, process substitution, word splitting.

Yet more information about types of expansion in Bash

Listen in ogg, spx, or mp3 format.

hpr2003 :: Using the Incron file watching daemon hosted by Mr. Young

2016-04-06. 00:11:38. Explicit.
incron, bash, watcher, daemon.

I briefly introduce the incron file watching daemon, and give an example of how I use it.

Listen in ogg, spx, or mp3 format.

hpr1990 :: Pomodoro Timer - The Evolution of a Script part deux hosted by Nacho Jordi

2016-03-18. 00:28:54. Clean.
Productivity, Bash basics, Programming design, Pomodoro, Timer, loops, sleep.

Further evolutions of a pomodoro script that got a life of its own

Listen in ogg, spx, or mp3 format.

hpr1987 :: Pomodoro Timer - The Evolution of a Script (pt 1) hosted by Nacho Jordi

2016-03-15. 00:22:07. Clean.
Productivity, Bash basics, Programming design, Pomodoro, Timer, loops, sleep.

The different stages of a bash script that was created accidentally

Listen in ogg, spx, or mp3 format.

hpr1952 :: Time now Ladies and Gents hosted by Ken Fallon

2016-01-26. 00:31:00. Clean.
fix_tags, ffprobe, ffmpeg, bc, sed, awk, grep, time, iso8601, date, mediainfo, xmlstarlet.

How to get the total duration of a lot of media files.

Listen in ogg, spx, or mp3 format.

hpr1951 :: Some additional Bash tips hosted by Dave Morriss

2016-01-25. 00:40:24. Explicit.
Bash, expansion, arithmetic expansion, shell arithmetic, number base.

More about expansion in Bash: this time arithmetic expansion

Listen in ogg, spx, or mp3 format.

hpr1903 :: Some further Bash tips hosted by Dave Morriss

2015-11-18. 00:29:18. Explicit.
Bash, expansion, tilde expansion, command substitution.

Some more information about types of expansion in Bash

Listen in ogg, spx, or mp3 format.

hpr1884 :: Some more Bash tips hosted by Dave Morriss

2015-10-22. 00:15:49. Explicit.
Bash, brace expansion, seq.

Some information about brace expansion in Bash that you might not know

Listen in ogg, spx, or mp3 format.

hpr1843 :: Some Bash tips hosted by Dave Morriss

2015-08-26. 00:21:17. Explicit.
Bash, pushd, popd, dirs.

A few useful Bash features that may not be well known

Listen in ogg, spx, or mp3 format.

hpr1838 :: Waking up with Windigo hosted by Windigo

2015-08-19. 00:15:25. Clean.
bash, scripting, terrible.

An overview of a terrible, hacky method of waking up.

Listen in ogg, spx, or mp3 format.

hpr1791 :: Organizing Photos with Bash hosted by Tony Pelaez

2015-06-15. 00:31:15. Explicit.
bash, photography, automation.

Use bash to simplify the process of organizing and backing up photographs.

Listen in ogg, spx, or mp3 format.

hpr1757 :: Useful Bash functions hosted by Dave Morriss

2015-04-28. 00:27:42. Explicit.
coding, Bash, script, function.

Some Bash functions that may be of use in your scripts

Listen in ogg, spx, or mp3 format.

hpr1710 :: Windows Remote Desktop on GNU/Linux hosted by Ken Fallon

2015-02-20. 00:11:19. Clean.
bash, xfreerdp, rdesktop, remmina.

A wrapper script for xfreerdp to make connecting to windows servers painless

Listen in ogg, spx, or mp3 format.

hpr1648 :: Bash parameter manipulation hosted by Dave Morriss

2014-11-26. 00:40:33. Explicit.
Bash, script, parameter, variable.

A summary and aide memoire of Bash parameter expansion methods

Listen in ogg, spx, or mp3 format.

hpr1430 :: thebestofyoutube.com download script hosted by Ken Fallon

2014-01-24. 00:38:32. Explicit.
Bash, YouTube, download.

A hacked script to download youtube videos

Listen in ogg, spx, or mp3 format.

hpr1247 :: Recording Terrestrial Radio with bash scripts and cron jobs hosted by Jon Kulp

2013-05-14. 00:14:36. Explicit.
bash, scripting, radio, streamripper, simple audio player.

Using a Bash script to capture terrestrial radio

Listen in ogg, spx, or mp3 format.

hpr1204 :: My Magnatune Downloader hosted by Dave Morriss

2013-03-14. 00:21:59. Explicit.
Magnatune, API, Bash, XML, XSLT, xsltproc.

How I download albums from Magnatune with Bash and Perl scripts

Listen in ogg, spx, or mp3 format.

hpr1197 :: What I do with bash scripts hosted by Jon Kulp

2013-03-05. 00:27:18. Explicit.
Bash, scripting.

Some personal anecdotes on writing Bash scripts

Listen in ogg, spx, or mp3 format.

hpr598 :: Bash Scripting: Episode 2 Command Line Basics hosted by Ken Fallon

2010-11-17. 00:38:33. Explicit.
bash, cli, command line.

Introduction to the man, info, and appropos commands, among other basics

Listen in ogg, spx, or mp3 format.

hpr562 :: Introduction to bash scripting hosted by Ken Fallon

2010-08-11. 00:20:32. Explicit.
bash, bash basics, bash scripting.

Introduction to bash scripting, with quick explanations of many adjacent concepts

Listen in ogg, spx, or mp3 format.

hpr543 :: Xoke's Podcasting Script hosted by Xoke

2010-05-24. 00:08:55. Explicit.
shell, scripts, scripting, bash.

An introduction to a script for recording podcasts

Listen in ogg, spx, or mp3 format.

hpr531 :: bash loops hosted by Ken Fallon

2010-03-24. 00:08:32. Explicit.
bash, loops, while loops, for loops, scripting, bash scripting.

While aboard an Airbus 320, Ken Fallon describes loops that are available in BASH

Listen in ogg, spx, or mp3 format.