| Show current shell | # echo $0 | |
| Cool RPM options | --oldpackage, --nodeps, -qa | grep [word] --erase -qf [file with path] |
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| zip a directory | zip -r file.zip [dir name] | |
| Start a second X session with 32-bit color depth on display 3 |
startx -- -bpp 32 :3 | |
| Find files containing xyzpdq in the current directory or lower and dump the full path and line number of matches. | find . -type f -name "*.cpp" -print | xargs grep -n xyzpdq |