How do I use substring in Linux?

Example 1: To Extract till Specific Characters from Starting

1. #!/bin/bash.
2. #Script to extract first 10 characters of a string.
3. echo “String: We welcome you on Javatpoint.”
4. str=”We welcome you on Javatpoint.”
5. echo “Total characters in a String: ${#str} “
6. substr=”${str:0:10}”
7. echo “Substring: $substr”

How do I extract a substring in bash?

Using the cut Command

Specifying the character index isn’t the only way to extract a substring. You can also use the -d and -f flags to extract a string by specifying characters to split on. The -d flag lets you specify the delimiter to split on while -f lets you choose which substring of the split to choose.