diff options
Diffstat (limited to 'bash.html.markdown')
| -rw-r--r-- | bash.html.markdown | 11 |
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 |