I just decided I want to share a few commands I use on daily basis that help me get around my daily terminal endeavors:

Start With A BANG!!

Use !! to threaten terminal to do something. Actually, it repeats whatever you typed earlier:

$ some_command -option something
permission denied
# evaluates to sudo some_command -option something
$ sudo !!
Done

Interested In Results

This is like how I perceive bosses and managers: They come in grumpy everyday, and are not interested in hearing about your recent breakthroughs or moments of enlightenments… “Show me some results!!”.

Anyways, while writing a script, you might be interested in the output of a command, rather than the actual execution. Here is an example:

# pwd is a command that prints the current working directory
$ sound_convert_to_caf `pwd`/*.mp3

Here, my dumb python script doesn’t take a relative path, nor resolves the current working directory, hence I must supply it with absolute paths. Using the back-ticks, one can easily resolve the absolute path! :D

Oscillation

Did you ever want to cd into a directory, but remembered the effort required to cd back into the current directory? Yeah, a basic solution would probably be:

$ cwd=`pwd`
$ cd other_directory
$ cd $cwd

But! Another, much more elegant way exist that allows you to go back and forth between the two directories

$ cd other_directory
$ cd - # takes us back to initial directory
$ cd - # takes us to the other_directory

Something Like… This?

Oh noes! You haz type cmd you can no longer .. have forgotten!!! Let terminal help you find it!!

Simply, hit Ctrl + r, and this will trigger the reverse search to allow you to do a fuzzy search on the commands you typed:

Example:

(reverse-i-search)`git ': git pull origin master

Recursion

This blew my mind, as I have never come across it earlier (lair, obviously, I probably just overlooked it). The /**/ syntax seems to be a recursion indication thing, not only in terminal, even in gitignore, for example.

$ images_convert_to_RGBA8888 directory/**/*.png

Conclusion

This is definitely just a fraction of what is truly helpful in terminal. I must be missing a few, and much, much more that I am still ignorant about…