The command "locate lmms" on the terminal gave me a lot of output, therefore I had to save the output in a file.

I opened the file on Kate and there are 4,640 lines of code.

How can I select all lines from 2-2,633?
Once I have them selected I can delete them and concentrate on the other lines.

First you should be able to just scroll to the start location (or use ctrl+g to go to a specific line) and use shift+up/down/pageup/pagedown/etc or shift-mouse-click to select the couple-hundred line chunk you want to remove and then hit delete. (I don't know of any keyboard shortcut to select from here to another specific line number; but I assume you were already scrolling around the file to figure out the start and end lines you wanted to remove).

If there's a common sub-string in the lines you want to remove, you can use kate's regex-based find-and-replace to remove those lines. In the dialog, ensure Mode is set to Regular expression, then in the Find box you can use a find expression like: .*commonText.*\n to find all lines which contain 'commonText', then (with an empty Replace field) hitting Replace All should remove all of them (the ".*" bit is a wild-card expression that matches anything except new-lines) (If you right-click in the Find box, there's an Add menu which shows the other regex elements you can add to the search criteria).

If you have to cut lines often, you can try using a sed:

Code: Select all

locate lmms | sed -n '2,2633!p' > concentrate.txt