ex: g/pattern1 ---print all lines containing pattern1

ex: /pattern1/;+5 ---print the first line containing pattern1 and 5 lines following it.

audit2allow -i /var/log/audit/audit.log

chcon -R -t httpd_user_content_t /var/www/

yum install postfix system-switch-mail

ex: 5,+5 --prints lines 5 through to current line +5. It can cause an error if the current line has a number less than the first line in range. 5;+5 with ; instead of , makes the end relative. ie it will be calculated from the first line of range.

ex: /foo/,/bar/d ---delete lines starting with the first occurance of foo through to the nex occurance of bar

ex: /gaga/+d ---delete a line below the first line containing 'gaga'. It is the same as /gaga/+1d

IPADDR_START ..

/etc/sysconfig/network-scripts/ifcfg-eth0-range0
IPADDR_START=192.168.0.100
IPADDR_END=192.168.0.200
CLONENUM_START=1 ---it can be any number. The devices will be numbered starting from it, e.g. if CLONENUM_START=5, then the first will be eth0:5.

~/.bash_profile: export EDITOR=vim; export VISUAL=vim; export PAGER=LESS

expand -i -t 18

ex: ,/gaga/d ---delete current line through to the next line containing 'gaga'

ex: /gaga/d ---delete next line containing gaga

ex: -,+t0 ---copy three lines (the line above the cursor through the line below the cursor) and put them at the top of the file.

mke2fs -t ext4 -O ^has_journal /dev/sdf -L sysrescuecd

grub-install --root-directory=/media/usbstick/ /dev/sdf

touch /forcefsck or `shutdown -rF now` ---the -F option forces fsck on reboot

no sound in skype with pulseaudio: pavucontrol

ex: ,+5# ---shows line numbers of 5 lines starting from the current one, ,+ 5# --with a space between + and the number, shows file numbers of current AND 5 following lines, i.e. 6 lines in total; +5# ---without comma in front, is not a range and will operate on exatly one line, the fifth from the current one

ex: .,+203# or ,+203 (dot can be ommitted, because it is presumed when + is used) --display line numbers from the current line to 203 lines further

ex: 500,$m.-2 ---move lines from 500 through the end of the file to two lines above the current line

httpd.conf: AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css application/javascript application/x-javascript ---enables compression ..

http://www.gidnetwork.com/tools/gzip-test.php

service httpd configtest

yum.conf: metadata_expire=90m

rpmbuild --showrc

ex: .,.+32d ----delete 32 lines starting from the current one

syslogd -a /var/named/chroot/dev/log

man bootparam

man capabilities

dnssec-keygen -a hmac-md5 -b 256 -n USER dyndns --> in the global part of named.conf add key dyndns { algorithm HMAC-MD5; secret "Qoeuoaeu";}; --> for each zone that you want to have dynamic updates write 'allow-update {key dyndns; };'