http://www.mindbent.org/2012/01/disabling-ip-conntrack-to-save-memory-r…

na versão mais recente:
killall -SIGQUIT gnome-shell
https://askubuntu.com/questions/100226/how-to-restart-gnome-shell-from-…

XDG_SESSION_TYPE=x11 DISPLAY= gnome-shell --display :0 --replace&
http://community.linuxmint.com/tutorial/view/641

o erro - ALERT - script tried to increase memory_limit to 100663296 bytes which is above the allowed value (attacker 'REMOTE_ADDR not set', file '/var/www/adsl.esb3-fernaomagalhaes.edu.pt/htdocs/novomoodle/lib/setuplib.php', line 80)

a correcção -
nano /etc/php5/conf.d/suhosin.ini
inserir no fim "suhosin.memory_limit=256M" 256M será substituído pelo limite definido no php.ini
https://moodle.org/mod/forum/discuss.php?d=99199

ERROR 1577 (HY000) at line 1: Cannot proceed because system tables used by Event Scheduler were found damaged at server start
ERROR 1547 (HY000) at line 1: Column count of mysql.proc is wrong. Expected 20, found 16. The table is probably corrupted

como corrigir:
mysql_upgrade -u root -p --force

/etc/aliases:

root: you@example.com

then run newaliases

http://www.linuxquestions.org/questions/debian-26/sending-root-mail-to-…

http://theyr.tv/cg/cna/I44350d/F=js*L=enCN*Y*u*130223*24*SPS*pt_Porto?4…

http://pastebin.com/JsM3Y182

https://gist.github.com/nvogel/2971772

http://www.rocko.me/how-to-downgrade-php-5-3-to-5-2-in-debian/

forward search:
CTRL-s

para funcionar desativar xon/xoff flow control:
stty -ixon

http://www.catonmat.net/blog/the-definitive-guide-to-bash-command-line-…
http://stackoverflow.com/questions/791765/unable-to-forward-search-bash…

http://www.avermedia-dvrs.com/