Merge remote-tracking branch 'upstream/master' into master

1 files changed, 9 insertions, 2 deletions

diff --git a/bash.html.markdown b/bash.html.markdown
index 856db706..7ca4285b 100644
--- a/bash.html.markdown
+++ b/bash.html.markdown
@@ -23,7 +23,7 @@ translators:
 ---
 
 Bash is a name of the unix shell, which was also distributed as the shell
-for the GNU operating system and as default shell on Linux and Mac OS X.
+for the GNU operating system and as the default shell on most Linux distros.
 Nearly all examples below can be a part of a shell script
 or executed directly in the shell.
 
@@ -88,6 +88,11 @@ echo ${Variable: -5} # => tring
 # String length
 echo ${#Variable} # => 11
 
+# Indirect expansion
+OtherVariable="Variable"
+echo ${!OtherVariable} # => Some String
+# This will expand the value of OtherVariable
+
 # Default value for variable
 echo ${Foo:-"DefaultValueIfFooIsMissingOrEmpty"}
 # => DefaultValueIfFooIsMissingOrEmpty
@@ -225,7 +230,9 @@ cat file.txt
 
 # We can also read the file using `cat`:
 Contents=$(cat file.txt)
-echo "START OF FILE\n$Contents\nEND OF FILE" # "\n" prints a new line character
+# "\n" prints a new line character
+# "-e" to interpret the newline escape characters as escape characters
+echo -e "START OF FILE\n$Contents\nEND OF FILE"
 # => START OF FILE
 # => [contents of file.txt]
 # => END OF FILE