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Top Forums Shell Programming and Scripting how can I delete lines without actually going into the file Post 17185 by LivinFree on Tuesday 12th of March 2002 02:56:06 AM
Old 03-12-2002
What about using "ed", or "ex"?
Say, you had a list of files and directories in a text file named tmp.list.
If you wanted to get rid of all items matching "Desktop" (the same as using "grep -v Desktop tmp.list > file.tmp; mv file.tmp tmp.list), you could do this:
Code:
ed tmp.list <<EndOfFile
g/Desktop/d
w
q
EndOfFile

... Piece of cake, eh?
This User Gave Thanks to LivinFree For This Post:
 

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E2TOOLS(7)						 Miscellaneous Information Manual						E2TOOLS(7)

NAME
e2tools - utilities to manipulate files in an ext2/ext3 filesystem DESCRIPTION
E2tools is a simple set of GPL'ed utilities to read, write, and manipulate files in an ext2/ext3 filesystem. These utilities access a filesystem directly using the ext2fs library. I wrote these tools in order to copy files into a linux filesystem on a machine that does not have ext2 support. Of course, they can also be used on a linux machine to read/write to disk images or floppies without having to mount them or have root access. Supported functionality: e2cp copy files e2mv move files e2rm remove files e2mkdir create directory e2ln create hard links e2ls list files/directories e2tail output the last part of a file In general, to specify a directory or file on an ext2 filesystem for the e2tools utilities, use the following form: filesystem:directory_path The filesystem can be an unmounted partition or a regular file that's been formatted to contain an ext2 filesystem. In general, if a com- mand takes multiple file names on the command line, if the first one contains an ext2 file specification, the rest of the files are assumed to be on the same filesystem until another one is explicitly stated: /tmp/boot.img:/tmp/file1 /tmp/file2 /tmp/file3 /tmp/boot2.img:/tmp/file4 Files 1-3 are on /tmp/boot.img and the last file is on /tmp/boot2.img SEE ALSO
e2cp(1), e2ln(1), e2ls(1), e2mkdir(1), e2mv(1), e2rm(1), e2tail(1). AUTHOR
The e2tools were written by Keith Sheffield <sheff@pobox.com>. This manual page was written by Lucas Wall <lwall@debian.org>, for the Debian project (but may be used by others). March 2, 2005 E2TOOLS(7)
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