diff options
Diffstat (limited to 'bash.html.markdown')
-rw-r--r-- | bash.html.markdown | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/bash.html.markdown b/bash.html.markdown index 15d1c068..57fb5c55 100644 --- a/bash.html.markdown +++ b/bash.html.markdown @@ -7,6 +7,7 @@ contributors: - ["Alexandre Medeiros", "http://alemedeiros.sdf.org"] - ["Denis Arh", "https://github.com/darh"] - ["akirahirose", "https://twitter.com/akirahirose"] + - ["Anton Strömkvist", "http://lutic.org/"] filename: LearnBash.sh --- @@ -72,15 +73,26 @@ echo Hello, $NAME! # use 'man test' for more info about conditionals if [ $NAME -ne $USER ] then - echo "Your name is your username" -else echo "Your name isn't your username" +else + echo "Your name is your username" fi # There is also conditional execution echo "Always executed" || echo "Only executed if first command fails" echo "Always executed" && echo "Only executed if first command does NOT fail" +# To use && and || with if statements, you need multiple pairs of square brackets: +if [ $NAME == "Steve" ] && [ $AGE -eq 15 ] +then + echo "This will run if $NAME is Steve AND $AGE is 15." +fi + +if [ $NAME == "Daniya" ] || [ $NAME == "Zach" ] +then + echo "This will run if $NAME is Daniya OR Zach." +fi + # Expressions are denoted with the following format: echo $(( 10 + 5 )) @@ -122,14 +134,28 @@ case "$VARIABLE" in esac # for loops iterate for as many arguments given: -# The contents of var $VARIABLE is printed three times. +# The contents of $VARIABLE is printed three times. for VARIABLE in {1..3} do echo "$VARIABLE" done +# They can also be used to act on files.. +# This will run the command 'cat' on file1 and file2 +for VARIABLE in file1 file2 +do + cat "$VARIABLE" +done + +# ..or the output from a command +# This will cat the output from ls. +for OUTPUT in $(ls) +do + cat "$OUTPUT" +done + # while loop: -while [true] +while [ true ] do echo "loop body here..." break |