Commands by jonavon

Commands by jonavon (3)

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Parse m3u playlist file for total time

Parse an m3u file with seconds for each item and output the length of the entire playlist Show Sample Output
This is sample output - yours may be different.
```
03:13:37
```
1

awk -F":|," '{RS="#"; sec+=$2}END{h=(sec/3600);m=((sec/60) % 60);s=(s;printf("%02d:%02d:%02d\n", h, m, s)}' file.m3u

jonavon · 2020-05-16 18:55:32 99
Check if port is open on remote machine

Check if port is open, if you don't have ncat on your machine. Show Sample Output
This is sample output - yours may be different.
```
Port is open
```
6

echo > /dev/tcp/127.0.0.123/8085 && echo "Port is open"

jonavon · 2020-05-03 13:30:13 425

Graphical tree of sub-directories with files

The command finds every item within the directory and edits the output so that subdirectories are and files are output much like the tree command Show Sample Output

find . -print | sed -e 's;[^/]*/;|-- ;g;s;-- |; |;g'

jonavon · 2019-09-25 17:49:35 100

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Backup files older than 1 day on /home/dir, gzip them, moving old file to a dated file.

Useful for backing up old files, custom logs, etc. via a cronjob.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

create a progress bar...

A simple way yo do a progress bar like wget.

check open ports without netstat or lsof

Show simple disk IO table using snmp

Show a simple table with disk IO for the specified host. you monitor a LOT of different thing. Mostly used for MRTG and similar, but this is nice for a quick look, which disk is busy. "public" is your SNMP community ensure that snmpd is running on the host which you intend to monitor

Process command output line by line in a while loop

This snippet allows to process the output of any bash command line by line.

Compress a series of png pictures to an avi movie.

cd /path/to/your/png_pics mencoder "mf://*.png" -mf fps=2 -o output.avi -ovc lavc -lavcopts vcodec=mpeg4 then you can get a movie named output.avi.

send a circular

Prefix every line with a timestamp

Useful to add a timestamp to every line printed to stdout. You can use `-Ins` instead of `-Iseconds` if you want more precision.

Top ten (or whatever) memory utilizing processes (with children aggregate) - Can be done without the multi-dimensional array

Stay in the loop…

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