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How to extract data from a string in Bash?
I was looking for a solution in Bash that can extract particular information after a specified string. For example (from running acpi ): How can I extract the percentage after discharge? In this case it would be 37% I am looking for a simple solution that does not require a bunch of command arguments.
How to search and extract data from files in Linux?
There are many tools that we can use at the Linux command line aimed directly at extracting data from files and searching that data. We can start by seeing how the modular nature of the UNIX and Linux command line shells allow for bespoke applications using pipes.
Is there a way to extract data from a file?
Yes, we have extracted data, the number if files in a directory. We call this an un-named pipe as it is created on the fly without the existence of a pipe file. This is very convenient for us on the command line but not so convenient for applications to be able to communicate.
How to extract 5 digits from filename in Bash?
Given a filename in the form someletters_12345_moreleters.ext, I want to extract the 5 digits and put them into a variable. So to emphasize the point, I have a filename with x number of characters then a five digit sequence surrounded by a single underscore on either side then another set of x number of characters.
How to extract part of a text file?
I want to extract some part of a big text file (here a lammps .lmps file), and manipulate it to create another file (here .xyz).
How to extract certain data from a line?
This is useful when the pattern you want occurs elsewhere in the file/line (for example, it’s a number and the file/line contains other numbers). In your example, this could be something like: [^,]+ means some characters that are not a comma, so this can grab text until a comma.
How to replace a text file in Bash?
The replacement may contain the special charac‐ ter & to refer to that portion of the pattern space which matched, and the special escapes \\1 through \\9 to refer to the corresponding matching sub-expressions in the regexp. g Copy/append hold space to pattern space. [^ ] Matches a single character that is not contained within the brackets.