Commands by avideh (0)

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Gentoo: Get the size of all installed packets, sorted
On a Gentoo system, this command will tell you which packets you have installed and sort them by how much space they consume. Good for finding out space-hogs when tidying up disk space.

Which .service related this file?
I use this as an alias to get all .service files related a single installed file/conf (if it has services, of course). For rpm based systems ;)

copy partition table from /dev/sda to /dev/sdb

How to check network connection from one interface
This command only check the network connection from given eth. This is very useful if you are using more then one interface in your server or laptop.

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

Convert wma to mp3@128k
Convert all wma to mp3@128k with ffmpeg into directory.

Test your total disk IO capacity, regardless of caching, to find out how fast the TRUE speed of your disks are
Depending on the speed of you system, amount of RAM, and amount of free disk space, you can find out practically how fast your disks really are. When it completes, take the number of MB copied, and divide by the line showing the "real" number of seconds. In the sample output, the cached value shows a write speed of 178MB/s, which is unrealistic, while the calculated value using the output and the number of seconds shows it to be more like 35MB/s, which is feasible.

LVM2 Reduce
Just the commands for the lvreduce I keep forgetting.

Substrings a variable
substrings a variable starting at position. If no offset given prints rest of the line

show the working directories of running processes
this shows the CWD of every running `java' command. YMMV but we often switch to a working directory for each service to start and run from there -- therefore this quicly shows what is running by a more meaningful name than command alone (the -bw prevents using blocking system calls which speeds this up quite a bit in the presence of remote mounted filesystems)

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