Bash’s string manipulation capabilities are used for data processing tasks. They allow users to extract, replace or modify strings within a script. For instance, substring extraction can be done using the syntax ${string:position:length}. Here, ‘position’ is the starting index and ‘length’ is the number of characters to extract. String replacement uses the format ${string/pattern/replacement}, replacing first match of ‘pattern’ with ‘replacement’. If all matches need to be replaced, double slashes are used before ‘pattern’. Bash also supports pattern matching where * represents any character(s) and ? represents a single character.
