Commands using cp

If you want to copy all files listed (with full path) in a text-file (i.e. cmus playlist.pl) to a certain directory use this nice oneliner...

Credits goes to RiffRaff: http://www.programmingforums.org/post242527-2.html

make a bunch of files with the same permissions, owner, group, and content as a template file

(handy if you have much to do w. .php, .html files or alike)

Let the shell handle the repetition in stead of find :)

Copies file to a temporary location, edit and set to real file's time stamp then copy back. Assumes access to /tmp and has $EDITOR, but can be replaced with better values.

sed '$ d' foo.txt.tmp

...deletes last line from the file

Appends the input file with the date format YYYY-MM-DD.bak. Also runs silently if you remove the -v on the cp at the end of the function.

As cp is often an alias to cp -i you can use \cp (or cp full path /bin/cp) to use the real cp command instead of its alias

Watch out if you have several USB drives plugged in: it scans the whole /media/ folder !!! You can replace /media/ by the path of a specific USB drive (something like /media/F77A-530B/)

I use a sound recorder and I want to plug the recorder and grab the most recent sound.

That's what this command does.

Use mv instead of cp to move instead of copy.

Change *.wav to the required file type.

You need to cp, mv, scp, ..., some files around from one place to another, and after having laboriously typed out the source path, you remember that the destination directory doesn't yet exist, and so the command will fail. So rather than killing the command line and starting over, just interpolate the results of creating the directory and echo its name. You could DRY this with a for; do; done, but that may be more trouble than it's worth.

You must spezify /where folder and / folder

If you have another camera you must experiment with Exif data (after -g and after grep) and mask of your photo files IMG_????.JPG

I have do it on Knoppix 6.7.0

You must have installed exiv2.

Backup a whole directory copying only updated files.

Certain Flash video players (e.g. Youtube) write their video streams to disk in /tmp/ , but the files are unlinked. i.e. the player creates the file and then immediately deletes the filename (unlinking files in this way makes it hard to find them, and/or ensures their cleanup if the browser or plugin should crash etc.) But as long as the flash plugin's process runs, a file descriptor remains in its /proc/ hierarchy, from which we (and the player) still have access to the file. The method above worked nicely for me when I had 50 tabs open with Youtube videos and didn't want to have to re-download them all with some tool.

When working with jailed environments you need to copy all the shared libraries to your jail environment. This is done by running ldd on a binary which needs to run inside the jail. This command will use the output from ldd to automatically copy the shared libraries to a folder of your choice.

You could do the following, however, brace expansion with {} is not defined in POSIX, and therefore not guaranteed to work in all shells. But, if it does, it's more convenient (although it's certainly not less typing):

Sometimes there are times when I need to cp(1), mv(1) or rm(1) files recursively, but don't want to traverse the previous directory by following ../../../../ etc out of the current directory. This command prevents that. The secret sauce is ".??*". The file globbing ensures that it must start with a dot, and be followed by at least two characters. So, three characters must exist in the filename, which eliminates "." and "..".