For example: Change Collation in a big database dump.

cat dumpname | sed s/CHARSET=utf8/CHARSET=utf8\ COLLATE=utf8_unicode_ci/ > neuer_dumpname

• Install imagemagick
• Create newdir and copy images to be resized into it
• cd into newdir

mogrify -format jpg -resize "800x500>" *

$ sed '/WORD1/,/WORD2/d' input.txt > output.txt

We were looking for a way to create mysqldumps which contained all the structures for the tables, but the data only for part of the tables.

nawk '/CREATE DATABASE \/\*\!32312 IF NOT EXISTS\*\/ \`%DB-NAME%\`/,$0 ~ /CREATE DATABASE/ && $0 !~ /%DB-NAME%/' DUMPFILE > DUMP_DB

Find first occurence of 'splitword' in file:

grep -n "splitword" bigdumpfile.sql | head -1 | cut -d : -f 1

Result is: 86948

Save partial dump:

cd into the directory you want to check

find -type l -exec ls -l {} \;

SELECT a.nid, b.nid FROM node AS a , node AS b WHERE a.nid = 13 AND b.nid !=14 AND b.nid !=15 ORDER BY RAND() LIMIT 3