Conditions

if#

if [ test_1 ] ; then
  echo "test 1"
elif [ test_2 ] ; then
  echo "test 2"
else
  echo "test 3"
fibash

test#

test test_1
  echo "test 1"bash

case#

case VARIABLE in
  "a")
    echo "1"
    ;;
  "b")
    echo "2"
    ;;
  "c")
    echo "3"
    ;;
  *)
    echo "0"
    ;;
esacbash

Character Strings#

Code	Description
$string1 = $string2	Identical
$string1 != $string2	Different
-z $string	Empty
-n $string	Not empty

Numbers#

Code	Description
$num1 -eq $num2	Equal
$num1 -ne $num2	Not equal
$num1 -lt $num2	Lower than
$num1 -le $num2	Lower or equal
$num1 -gt $num2	Greater than
$num1 -ge $num2	Greater or equal

Files#

Code	Description
-e $my_file	Exists
-d $my_file	Folder
-f $my_file	File
-L $my_file	Symlink
-r $my_file	Readable
-w $my_file	Writable
-x $my_file	Executable
$file1 -nt $file2	Newer than
$file1 -ot $file2	Older than