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 "..".

expand to:

cp /work/host/phone/ui/main.cpp /work/target/phone/ui/main.cpp

!#

The entire command line typed so far.

This causes cp to detect and omit large blocks of nulls. Sparse files are useful for implying a lot of disk space without actually having to write it all out.

http://en.wikipedia.org/wiki/Sparse_file

You can use it in a pipe too:

preserve all except context and xattr. useful when moving a running system to a new partition.

Some people put spaces in filenames. Others have an $EDITOR environment variable set. This defaults to vim, but you can use whatever you wish: emacs, nano, ed, butterflies, etc.

Remember to backup everything before changing it so you can restore all to normal.

1) Find true type fonts;

2) Copy them to /usr/share/fonts/truetype;

3) Reload font information.

Bash function copies a file prefixed with a version number to a subdirectory

This is a BASH feature.

The above command will create a backup of "filename" called "filename.DATE", where DATE is the actual day in %Y%m%d (year, month and day numbers together) format.

Take a folder full of files and split it into smaller folders containing a maximum number of files. In this case, 100 files per directory.

find creates the list of files

xargs breaks up the list into groups of 100

for each group, create a directory and copy in the files

Note: This command won't work if there is whitespace in the filenames (but then again, neither do the alternative commands :-)

Smaller Code

Better Runtime

This will tighten up security for your box. The default value for PermitRootLogin sadly is 'yes'.

even shorter (infix) version.

"infix" version in bash (4.x+)

Remove -v to make it silent.

BTW: The OP forgot to use "cat" and "nmap" ;-) I had a good laugh though.

This backup function preserve the file suffix allowing zsh suffix aliases and desktop default actions to work with the backup file too.