unzip all zip files in the current dir to a separate folder

for file in `ls *.zip`; do unzip $file -d `echo $file | cut -d "." -f 1`; done

March 16th, 2012

linux :: add a new hdd

e.g. /dev/sdb

partition disk:

fdisk /dev/sdb
new partition: key n
primary partition: key p
partition 1
default values
write: key w

format disk:
mkfs -t ext3 /dev/sdb1

edit /etc/fstab accordingly

February 2nd, 2012

convert between character sets on linux

to convert a file from utf-16 to utf-8 you can use recode (make a copy of the file first!):

recode UTF16..UTF8 myFile.txt

January 30th, 2012

diff two folders on OSX

diff -qr "path/to/first/dir" "/path/to/second/dir" | grep -v -e 'Thumbs' -e 'DS_Store' | sort > diff.txt

December 15th, 2011

openvpn resolv.conf

sudo rm /etc/resolv.conf
sudo ln -s /etc/resolvconf/run/resolv.conf /etc/resolv.conf

December 5th, 2011

selecting a random file in the current folder

#!/bin/bash
files=(*)
echo "${files[RANDOM % ${#files[@]}]}"

November 3rd, 2011

using grep and xargs

open all files that contain “/sdk/” for edit:
grep -Rl "/sdk/" . | xargs p4 edit

replace all occurences of /sdk/ with /new_sdk/
grep -Rl "/sdk/" . | xargs sed -i "s#/sdk/#/new_sdk/#g"

September 17th, 2011

reindex avi

if your avi index is corrupt, you can use a tool included in MPlayer (on OSX: sudo port install MPlayer)

mencoder -idx corruptAvi.avi -ovc copy -oac copy -o ReIndexedAvi.avi

September 15th, 2011

replace non ascii chars in file names

for filename in *.xml; do newname=`echo $filename | tr -cd '\11\12\15\41-\176'`; mv "$filename" "$newname"; done

June 21st, 2011

trace file access on OSX

OSX contains some tools for system level analysis originally developed for Solaris – one of them is opensnoop.
The tools’ descriptions can be found here: http://www.brendangregg.com/dtrace.html

May 23rd, 2011