{"id":34832,"date":"2024-01-23T03:40:10","date_gmt":"2024-01-23T03:40:10","guid":{"rendered":"https:\/\/linuxsimply.com\/?p=34832"},"modified":"2024-04-28T04:49:19","modified_gmt":"2024-04-28T04:49:19","slug":"substring-bash","status":"publish","type":"post","link":"https:\/\/linuxsimply.com\/bash-scripting-tutorial\/string\/substring\/","title":{"rendered":"How to Extract Bash Substring? [5 methods]"},"content":{"rendered":"

In Bash, a substring is a part of a string derived or extracted from the string. Substring provides powerful features for text manipulation and processing. Substring extraction is essential for text manipulation.<\/p>\n

You can use the following methods to extract Bash substring:<\/p>\n

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  1. Using Bash\u2019s substring expansion: ${input_string:start_index:length}<\/code><\/li>\n
  2. Using the \u201ccut\u201d command: cut -c N-M <<< input_string<\/code><\/li>\n
  3. Using the \u201cawk\u201d command: awk '{print substr($input_string,start_index, length)}'<\/code><\/li>\n
  4. Using the \u201cexpr\u201d command: expr substr input_string start_index length<\/code><\/li>\n
  5. Using the \u201cgrep\u201d command: echo input_string | grep -o \u201csubstring\u201d<\/code><\/li>\n<\/ol>\n

    There are two types of bash substring extraction: index-based<\/strong> and pattern-based<\/strong>.<\/p>\n

    In this article, I\u2019ll explain 4 methods of index-based substring extraction and 3 methods of pattern-based substring extraction in Bash. So let’s get started!<\/p>\n

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