.2016.08.31.stream-redirection

.2016.08.31.stream-redirection

2016.08.31.stream-redirection

example.sh

# no redirection
$ echo 'hello'
  hello
  
# redirects standard error (no error in this case)
$ echo 'hello' 2> /dev/null
  hello
  
# redirects standard out to /dev/null (so no output) 
$ echo 'hello' 1> /dev/null 
  
# redirects everything to /dev/null (so no output)
$ echo 'hello' &> /dev/null 

# no redirection (causing error)    
$ unlink unexisting-file.sh 
  unlink: unexisting-file.sh: No such file or directory

# redirects standard error to /dev/null (so no error)
$ unlink unexisting-file.sh 2> /dev/null

# redirects everything to /dev/null (so no error)
$ unlink unexisting-file.sh &> /dev/null

syntax.text

<operation> [n]> /dev/null [options]