Commands by fzero (4)

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Remove security limitations from PDF documents using ghostscript (for Windows)
#4345 also works under windows

Determine next available UID
Typical usage would be in a script that would want the next open UID in a range (in this case 500-600)

Download last file from index of

Display current time in requested time zones.
The time zone names come from the tz database which is usually found at /usr/share/zoneinfo.

Creates PodFeeds.txt, a file that lists the URLs of rhythmbox podcasts from the rhythmdb.xml file.
The first grep any line with pod-feed in it plus the following five lines. The second grep throws out any line not containing . sed removes the leading four spaces then and the trailing . Using a colon as sed's separating character avoids having to escape the /. Works ok with Mythbuntu 9.04 (used mostly as a three line bash script).

Detect illegal access to kernel space, potentially useful for Meltdown detection
Based on capsule8 agent examples, not rigorously tested

Find C/C++ source code comments
This is a naive way of finding source code comments in source code files that use C-like comments: // and /*...*/

Text graphing ping output filter
Nasty perl one-liner that provides a sparkline of ping times. If you want a different history than the last 30, just put that value in. It (ab)uses unicode to draw the bars, inspired by https://github.com/joemiller/spark-ping . It's not the most bug-free piece of code, but what it lacks in robustness it makes up for in capability. :) If anyone has any ideas on how to make it more compact or better, I'd love to hear them. I included a ping to google in the command just as an example (and burned up 10 chars doing it!). You should use it with: $ ping example.com | $SPARKLINE_PING_COMMAND

CPU architecture details
This command list all CPU technical infos.

Sync the existing directory structure to destination, without transferring any files


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