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File conversion script

Posted 12-29-2012 at 10:04 AM by Snark1994
Updated 12-29-2012 at 10:10 AM by Snark1994

A handy script I put together to automatically convert between file formats based on file extension, in an easily extensible manner:

Code:

#!/usr/bin/env bash

#Conversion rules:
# commands["extension_from extension_to"]="convert_command"
# INFILE and OUTFILE in the conversion command are replaced
# with the appropriate filenames

declare -A commands
commands["wav mp3"]="ffmpeg -i INFILE OUTFILE"

...

Snark1994

Senior Member

Posted in Uncategorized

Views 1496 Comments 0 Snark1994 is offline

Bash quickie: loop N times, without doing math

Posted 10-22-2012 at 09:07 PM by the dsc (linux-related notes)
Updated 03-10-2013 at 12:25 AM by the dsc (improving, varible version)

Tags bash, loop

I thought that the only way to do such type of loop in Bash would require something like "n=$(($n+1))" within the loop, with the loop being conditioned to "n" adding up to whatever you want, such as "until ((n==30)) ; do". But you can actually do "for i in {1..20} ; do <whatever> ; done". That's somewhat similar to Basic's "for i=1 to 20 ; whatever ; next i".

But it won't work with variables for the starting and ending numbers....

the dsc

Member

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Example script to run and manage a service (tcpdump) with managed logging.

Posted 10-11-2012 at 07:59 PM by konsolebox
Updated 05-27-2018 at 03:10 PM by konsolebox

Tags bash, logging, script, service, tcpdump

I made this script as a reply to a question on a thread before. The accidentally simplified complexity of it amazes me so I thought that it would be nice to post this on a blog as well. Original thread: https://www.linuxquestions.org/quest...cpdump-800385/

The script runs and manages a service (tcpdump). It could also automatically delete files older than C days, and reduce the size of a logfile if it's already larger than N bytes....

konsolebox

Senior Member

Posted in Howtos

Views 9369 Comments 0 konsolebox is offline

libfind - Searches library files with keywords and paths from default values and /etc/ld.so.conf.

Posted 09-17-2012 at 01:03 AM by konsolebox
Updated 05-27-2018 at 03:10 PM by konsolebox

Tags bash, script

I made this utility along with binfind. It also has had lots of improvements since then.

This script can be used to search files contained in library files (*.so, *.la, *.a, etc.) based from keywords provided. Along with a custom list of default paths, it will search for libraries inside directories that are specified in /etc/ld.so.conf. It would also examine files that are specified by the "include" directive in it.

After preparations it would search for...

konsolebox

Senior Member

Posted in Howtos

Views 1797 Comments 0 konsolebox is offline

bash sort using a tab delimiter

Posted 09-07-2012 at 01:49 PM by NullTerminator
Updated 09-07-2012 at 02:49 PM by NullTerminator

Tags bash, sort, tab

There are several ways to sort things when fields are tab separated. The simplest I have found is

Code:

TAB=`echo -e "\t"`
sort -t"$TAB" -k 5,3 scrambledFile.tsv > sorted.tsv

syntax may vary for dos shells, possibly as

Code:

set tab=echo "\t"
sort -t"%tab%" -k5,3 scrambledFile.tsv > sortedFile.tsv

As of this posting, both variations are subject to verification of the syntax.

NullTerminator

LQ Newbie

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Views 1197 Comments 0 NullTerminator is offline

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