I’m sort of obsessed about iteration speed. I’ve written about this in the past and it deserves more posts in the future, but the quick summary is that iteration speed is always going to be the strongest competitive advantage in this industry. There’s of course many ways we can iterate faster, but for today let’s focus on two particular aspects of it: testing and deploying more often.
Write a string to standard output that indicates the pathname or command that will be used by the shell, in the current shell execution environment (see Shell Execution Environment), to invoke command_name, but do not invoke command_name.
if [ ! `command -v iconv` ]; then echo "not exists"; fi