FreeKB - Bash Shell Scripting articles

FreeKB - Bash Shell Scripting articles

Bash Shell Scripting articles

ArraysGetting Started with Arrays Append values to an array (+=)Count values in an arrayCommand Line Options and FlagsCommand line options flags arguments (case statement)EmailSend a daily email (cron)FilesCreate Excel or CSV fileFunctionsGetting Started with functionsif elif else thenif, elif, else, then statementsIFS (Internal Field Separator)IFS (Internal Field Separator)Loopsfor loops Move onto next value in a loop (continue)select loops while loopsMathAddition Division Multiplication SubtractionPrintingprinting bold textRegular ExpressionsAdd a leading zero to single digit numbers in Linux append new lines to a file or variable carriage returns (\r ^M)do something empty lines (sed)do something every nth match do something every other match do something forward slashes do something last match do something match does/doesn't begin with pattern do something match does/doesn't end with pattern do something pattern match do something range match grep previous or next match inline text (paste command)newlines \n replace string in file uppercase or lowercase (tr command)whitespace \s wildcard characterScript interpreterUnderstanding script interpreterSSHGetting Started with SSHVariablesappend values to a variable (+=)join lines in a variable join lines in different variables local and remote variables with SSH remove duplicate values from a variable remove new lines from a variable replace values in a variable