Wondering what use the yes
command might be, I stumbled upon this comment, and tried to execute
yes $(yes yes)
From what I understand, this should simply print out an infinite sequence of yes
, but instead it outputs nothing and crashes my graphical terminal after a few seconds. (If I execute it on tty1, I see the login prompt after some time.)
What is happening here?
Best Answer
It should already be enough to run
The
$(...)
runs the inner command until it is finished and captures all its output. - Now asyes
runs a long time and generates a lot of output, bash will eventually run out of memory and crash.