Linux: BASH Shell Misc Tips
How to find the exit code of last shell command?
In bash, echo $? prints the exit code of last command.
kill, bash builtin or /bin/kill ?
If you are using bash, type type kill to find out.
In Ubuntu 12.04, clearly it's calling the bash version. You can confirm by comparing the output of:
kill -l /bin/kill -l
How do i start bash without loading any init files?
bash --noprofile --norc
See also: Bash Init (Profile), .bashrc .profile .bash_profile .
How to do set font for xterm?
In xterm, hold Ctrl then right click to change font size. Also, Left and middle click change other options.