dhite99 asked on 2013-06-17. the portion after spring.profiles.active= , till the next space For a file: use sed to extract a substring using regular expressions. Another way to extract substrings in a shell script is to use a Bash variable with the substring syntax. b=${a:12:5} where 12 is the offset (zero-based) and 5 is the length. I would like to extract a substring using sed. Bash provides a way to extract a substring from a string. I can get the name of the interfaces since they start with 'wlp...' but the problem is I can't stop 'sed' from printing the whole line. In this Bash Tutorial, we shall learn to compute substring of a string given starting position and length of substring.. Syntax. Shell Scripting; Scripting Languages; Linux; 4 Comments. It doesn’t have an interactive text editor interface, however. I have a column in a table with a variable length string and I want to extract a substring of everything that comes before the charcter '-'. Active 1 year, 6 months ago. 36. To find substring in bash, use the following syntax : … It expands to up to length characters of the value of parameter starting at the character specified by offset. grep and sed are probably the tools you want, depending on the structure of text. 2 nd way – The slice object for getting the substring. Viewed 4k times 6. sed to extract pattern between a substring and first occurance of numeric in a string. Posted by: admin November 19, 2017 Leave a comment. Extracting sub string at Bash is very easy, let say you have a phone number 012-4567890 and you just wanna extract 4567890 out, you can do as below. the String is : [1365465464.1654] fasfa fsaf df16A fas 2.2 (7/2134) number result : 16A. This option tells sed to edit files in place. Active 3 years, 4 months ago. In our previous sed articles we learned — sed printing, sed deletion, sed substitute , sed file write, and sed multiple commands. # Usage: $0