Ruby Language Operating System or Shell commands Clasic ways to execute shell code in Ruby:
Example
Exec:
exec 'echo "hello world"'
or
exec ('echo "hello world"')
The System Command:
system 'echo "hello world"'
Will output "hello world" in the command window.
or
system ('echo "hello world"')
The system command can return a true if the command was successful or nill when not.
result = system 'echo "hello world"'
puts result # will return a true in the command window
The backticks (`):
echo "hello world"
Will output "hello world" in the command window.
You can also catch the result.
result = `echo "hello world"`
puts "We always code a " + result
IO.popen:
# Will get and return the current date from the system
IO.popen("date") { |f| puts f.gets }
