Commands by pjacob (1)

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Who has the most Apache connections.
This will tell you who has the most Apache connections by IP (replace IPHERE with the actual IP you wish to check). Or if you wish, remove | grep -c IPHERE for the full list.

Split lossless audio (ape, flac, wav, wv) by cue file

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Find usb device
I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

statistics in one line
In this example, file contains five columns where first column is text. Variance is calculated for columns 2 - 5 by using perl module Statistics::Descriptive. There are many more statistical functions available in the module.

Remotely sniff traffic and pass to snort
I have a small embedded linux device that I wanted to use for sniffing my external network, but I didn't want to recompile/cross-compile snort for the embedded platform. So I used tcpdump over ssh to pass all the traffic as pcap data to a "normal" Linux system that then takes the pcap data and passes it to snort for processing.

Save all commands from to plain text sort by vote
Faster then other method using wget For obtain all commands use $nu=`curl |grep -o "Terminal - All commands -.*results$" | grep -oE "[[:digit:],]{4,}" | sed 's/,//'`; $curl[0-"$nu":25] | grep -vE "_curl_|\.com by David" > clf-ALL.txt For more version specific $nu=`curl |grep -o "Terminal - All commands -.*results$" | grep -oE "[[:digit:],]{4,}" | sed 's/,//'`; $curl[0-"$nu":25] | grep -vE "_curl_|\.com by David" > clf-ALL_"$nu".txt Also download dirctly from my dropbox My drop box invitaion link is . Use it and get free 2.5 GB space.

Generate SHA1 hash for each file in a list
All output is placed in file SHA1SUMS which you can later check with 'sha1sum --check'. Works on most Linux distros where 'sha1sum' is installed.

move a lot of files over ssh
Useful to move many files (thousands or millions files) over ssh. Faster than scp because this way you save a lot of tcp connection establishments (syn/ack packets). If using a fast lan (I have just tested gigabyte ethernet) it is faster to not compress the data so the command would be: tar -cf - /home/user/test | ssh [email protected] 'cd /tmp; tar xf -'

disable history for current shell session

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