When I was writing Ruby, I wanted to execute a system command in a script, so I looked it up.
Kernel#system
This is the simplest way to write.
system("ls")
# => true
The command execution result is returned to the standard output. The return value of the method is as follows
--true When the command succeeds
-- false When the command fails
--When there is no nil command
Kernel#`
It is used when you want the command execution result as a return value.
`ls`
# => "Applications\nLibrary\nSystem\nUsers\nVolumes\nbin\ncores\ndev\netc\nhome\nopt\nprivate\nsbin\ntmp\nusr\nvar\n"
It seems that the return value is a character string type.
%x||There seems to be an alias called.