segmentation fault (core dumped)

Several tips while running into this message. 1) you can find the corresponding crash files at /var/crash 2) If you use bash shell, ulimit command limits how much core you dump upon seg fault. for instance, $ ulimit -c unlimited. With this setting, seg fault happens, you will see filename core. use GDB to debug with the core file. In GDB, type where to see the stack backtrace

Source code analysis

star UML

http://en.wikipedia.org/wiki/StarUML

Latex math examples

http://meta.wikimedia.org/wiki/Help:Displaying_a_formula

svn delete with wildcard

use find and xargs

example:

find target-folder/ -maxdepth 1 -name target_name[1-9]* | xargs -I '{}' svn rm '{}'

making a linux machine ap

http://www.su-root.eu/computing/turn-your-linux-computer-in-a-wireless-access-point-using-hostapd

redirecting error output

redirecting error output while lively seeing it

rm 2>&1 1> output | tee /tmp/tmp

traffic control examples

$ tc qdisc show dev eth5

$ tc class show dev eth5

$ tc qdisc del dev eth5 root

bonus (ethtool


$ ethtool -s eth6 speed 1000 duplux full

$ ethtool -s eth6 speed 100 autoneg off