Beginner Level: “playing with checksums”

Anticipated Bash content includes:

• command-line interface
• parse input and format output
• flow control: branching with if
• variables
• functions
• data processing

First Session

On Tuesday 25^th January 2022 from 18:00 to 19:00 UTC.

Handouts

• First Session (PDF)
• “Hello, World!” (script)
• prompt the installed versions of Bash and FFmpeg (script)

Bash Cookbook for Archivists

• Built-in Shell commands
• Built-in Bash commands
• The IF statement
• Pattern matching
• grep – File pattern searcher

Exercices

• Modify the script to check Bash and bash using pattern matching.
• Modify the script to prompt also the versions of Nano and MediaInfo.

Solution

• prompt the installed versions of Bash, FFmpeg, Nano and MediaInfo (script)

Second Session

On Thursday 27^th January 2022 from 18:00 to 19:00 UTC.

Handouts

• Second Session (PDF)
• MD5 checksum of a file, course version (script)

Bash Cookbook for Archivists

• Built-in Shell Variables (and Arrays)
• Variable Substitution
• Functions

Exercices

• Use the md5sum external command rather than md5 to compute the MD5 checksum.
• Check that no more than one parameter is passed to the script.
• Modify the script to write the result into a file, named input_file_extension_md5.txt rather than to the Terminal.

Solution

• MD5 checksum of a file, exercice version (script)

Third Session

On Tuesday 1^st February 2022 from 18:00 to 19:00 UTC.

Handouts

• Third Session (PDF)
• used and not used FFmpeg commands (plain text)
• frame MD5 chechsum manifest of an AV file, course version (script)

Bash Cookbook for Archivists

• Simple redirection

Exercice

• Modify the script to compute also the checksum of the generated frame MD5 checksum manifest. Use all the different checksum tools that are installed on your computer (MD5, SHA-1, SHA-256, SHA-512, CRC-32, xxHash 32, xxHash 64 and/or xxHash 128).

Solution

• frame MD5 chechsum manifest of an AV file, exercice version (script)

Appendix

• list installed checksum tools (script)
• run different checksum tools (script)

2022-02-14