Commands by thrifus

Commands by thrifus (3)

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Replace + Find

This version works on OS X (if you have installed `rename`)
This is sample output - yours may be different.
0

find <mydir> -type f -exec rename 's/<string1>/<string2>/g' {} \;

thrifus · 2015-11-19 17:51:13 4
An EXTREMELY powerful fork bomb. You have been warned.

A normal fork bomb looks something like this: _(){ _|_& };_ If you really felt like it, you could even create a devastating little script like this: #!/bin/bash _(){ _|_&&_& };_;:(){ :|:&&:& };:;.(){ .|.&&.& };. Please, for the love of resources, do not run this on a company, school, public, etc machine. Show Sample Output
This is sample output - yours may be different.
```
-bash: fork: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
```
0

_(){ _|_&&_& };_

thrifus · 2015-11-05 23:20:23 6
Bold & Normal Text Variables

Good for use in your ~/.bash_profile or a script. Show Sample Output
This is sample output - yours may be different.
```
echo "${BOLD}This is bold,${NORM} and this is not."
```
0

BOLD=$(tput bold); NORM=$(tput sgr0)

thrifus · 2015-10-12 15:53:12 6

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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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