There are several commands that I have come across yesterday that were helpful.
git config --global core.editor emacsclient- make git use
emacsclientfor editing commit messages.
git config --global core.pager ''- make git output everything to standard output, rather than use a pager application.
git log HEAD~10..HEAD- make
git logshow only last 10 commits.
git log --pretty=oneline | head -n 10- make
git logshow last 10 commits, displaying one line per commit.
xrandr --output LVDS --brightness 1.0- make screen brightness 100%.
It is interesting to observe how well the UNIX philosophy works. A UNIX program does only one job, but it does it well.