Table of Contents

• tee

tee reference

$ echo 'foo' | tee foo.txt
foo
$ cat foo.txt
foo

$ cat foo.txt
foo
$ echo 'bar' | tee -a foo.txt  # append
bar
$ cat foo.txt
foo
bar

# Redirecting stdout is not affected by 'sudo'
$ echo 'foo' >> file
zsh: permission denied: file

# 'tee' can be used to work around this
$ echo "foo" | sudo tee -a file