Coretanium

boot from cd – linux rescue

sh-3.1# umount /mnt/sysimage/data
sh-3.1# tune2fs -O ^has_journal /dev/sda6
sh-3.1# e2fsck -y /dev/sda6
sh-3.1# mount -t ext3 /dev/sda6 /mnt/sysimage/data
sh-3.1# rm -f /mnt/sysimage/data/.journal
sh-3.1# umount /mnt/sysimage/var
sh-3.1# tune2fs -j /dev/sda6
sh-3.1# exit

To see what processes are accessing the disk partition you can use either lsof or fuser.
lsof /tmp
mysqld 13103 mysql 6u REG 8,6 0 12 /tmp/ibisfIna (deleted)
mysqld 13103 mysql [...]

7000 and 8000 series 3ware Escalade™ ATA RAID controllers manual
http://www.3ware.com/support/UserDocs/CLI_UG.pdf
http://www-d0.fnal.gov/~melnit/tw_cli.8.html

Implementing caching on high traffic websites will save you loads of bandwidth and drastically speed up your site loading time for visitors. By using apache modules mod_expires and mod_header you will be able to control exactly what is cached, how long it’s cached for and how proxy servers should behave around your websites.
All static content [...]

sed -i ’s/foo/bar/’ file(s) or *
or
sed -i ‘/foo/d’ file(s) or *
or
find /path/to/files -type f -name myfile1 -exec sed -i ’s/foo/bar/’ {} \;
or
find /path/to/files -type f -name myfile1 | xargs sed -i ’s/foo/bar/g’

cat file | awk ‘{ print “mysql mydatabase -u ” $3 ” -p”$4″ -h ” $2 ” -e \042SELECT name FROM domains WHERE status = \0470\047\042 >> “$1″.active”}’
echo -e “\047″
\047 being a single quote
\042 being a double quote

If you ever needed to get your own IP from shell to use in scripts…

host $(who -m | awk ‘{ print $5 }’ | sed ’s/[()]//g’) | awk ‘{ print $4 }’

Above code is used in a script which updates apache ACL’s with current IP… makes it much easier than manually editing.

#!/usr/bin/sh
cp `grep -lr ‘STRING’ /dir` /newdir