Commands tagged unix

while commandt

do

command

command

...

done

{commandt is executed and its exit status tested.}

for i in 1 2 3

> do

> echo $i

> done

sed '$ d' foo.txt.tmp

...deletes last line from the file

Output lines starting at line 2.

This physical volumne - hdisk1 - has TOTAL PPs:11999 (1535872 megabytes) -> 1.5 TB

This physical volumne - hdisk1 - has -> 60 GB

Like the above, but runs a single rm command

This will check if there are any empty directories, or newly emptied directories, in a list of directories. It will then delete all of those directories. It works with gnu find and OSX/BSD find.

An example config file is placed in the sample output along with the command line call to use it.

The rsync daemon here is setup on the destination, thus requiring the read only = false flag. Also it uses uid and gid of root, change as required.

Specify the size in bytes using the 'c' option for the -size flag. The + sign reads as "bigger than". Then execute du on the list; sort in reverse mode and show the first 10 occurrences.

Will rot 13 whatever parameter follows 'rot13', whether it is a string or a file. Additionally, it will rot 5 each digit in a number

list top committers (and number of their commits) of svn repository.

in this example it counts revisions of current directory.

if you dont want to alias also then you can do

killall rapidly_spawning_process ; !! ; !! ; !!

Use this if you can't type repeated killall commands fast enough to kill rapidly spawning processes.

If a process keeps spawning copies of itself too rapidly, it can do so faster than a single killall can catch them and kill them. Retyping the command at the prompt can be too slow too, even with command history retrieval.

Chaining a few killalls on single command line can start up the next killall more quickly. The first killall will get most of the processes, except for some that were starting up in the meanwhile, the second will get most of the rest, and the third mops up.

More recent versions of the date command finally have the ability to decode the unix epoch time into a human readable date. This function makes it simple to utilize this feature quickly.

extension to tali713's random fact generator. It takes the output & sends it to notify-osd. Display time is proportional to the lengh of the fact.

Though without infinite time and knowledge of how the site will be designed in the future this may stop working, it still will serve as a simple straight forward starting point.

This uses the observation that the only item marked as strong on the page is the single logical line that includes the italicized fact.

If future revisions of the page show failure, or intermittent failure, one may simply alter the above to read.

The file lastfact, can then be examined whenever the command fails.

While it seems (to me at least) a little counter-intuitive to filter on name first, this requires less work for find, as it allows it to immediately discount any files that do not match the name directly from the directory listing on disk. Querying against file attributes requires reading the file attributes, which is performed for all files matching any name based predicates.

Trickle is a voluntary, cooperative bandwidth shaper. it works entirely in userland and is very easy to use.

The most simple application is to limit the bandwidth usage of programs.