The mktemp Command Tutorial With Examples For Newcomers


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We already know learn how to create recordsdata of a sure measurement in Linux. Creating recordsdata with the given measurement will be useful in lots of events. For instance, after deploying a brand new file server, you may wish to verify add restrict, most add measurement, and obtain velocity of the recordsdata and so on. In such instances, you’ll be able to create recordsdata of particular measurement and check them in your file server. There may be additionally a devoted command line software named “mktemp” is offered to create non permanent recordsdata and directories. The mktemp command creates a brief file or listing safely and prints its title. All recordsdata and directories will likely be saved within the system’s non permanent listing, i.e /tmp. So you needn’t to manually clear up them. When you rebooted your system, the non permanent recordsdata will likely be gone.

Linux mktemp Command Tutorial With Examples For Beginners

The mktemp Command Tutorial With Examples

Mktemp is a part of GNU coreutils package deal. So don’t hassle with set up. We’ll see some sensible examples now.

To create a brand new non permanent file, merely run:

$ mktemp

You will notice an output like under:


As you see within the output, a brand new non permanent file with random title “tmp.yjcVSaKkuv” is created in /tmp listing. This file is simply an empty file.

How a couple of non permanent listing? Sure, it’s also attainable! To create a brief listing, use -d choice.

$ mktemp -d

This may create a random empty listing in /tmp folder.

Pattern output:


All recordsdata will likely be created with u+rw permission, and directories with u+rwx, minus umask restrictions.

You’ll be able to confirm the file or listing permissions utilizing ls command.

$ ls -al /tmp/tmp.yjcVSaKkuv
rw——- 1 sk sk zero Aug 22 16:51 /tmp/tmp.yjcVSaKkuv
$ ls -al /tmp/tmp.vrhruN1WVX/
whole eight
drwx—— 2 sk sk 4096 Aug 22 16:58 .
drwxrwxrwt 12 root root 4096 Aug 22 17:36 ..

Advised learn:

As I already mentioned, all recordsdata and directories are created with a random file names. We will additionally create a brief file or listing with a customized title. To take action, merely add a minimum of three consecutive ‘X’s on the finish of the file title like under.

$ mktemp ostechnixXXX

Equally, to create listing, simply run:

$ mktemp -d ostechnixXXX

Please word that when you select a customized title, the recordsdata/directories will likely be created within the present working listing, not /tmp location. On this case, it is advisable to manually clear up them.

Additionally, as chances are you’ll observed, the X’s within the file title are changed with random characters. You’ll be able to nevertheless add any suffix of your selection.

For example, I wish to add “weblog” on the finish of the filename. Therefore, my command could be:

$ mktemp ostechnixXXX –suffix=weblog

Now we do have the suffix “weblog” on the finish of the filename.

In case you don’t wish to create any file or listing, you’ll be able to merely carry out a dry run like under.

$ mktemp -u

For assist, run:

$ mktemp –help

Why can we really want mktemp?

You may marvel why do we’d like “mktemp” whereas we are able to simply create empty recordsdata utilizing “contact filename” command. The mktemp command is especially used for creating non permanent recordsdata/directories with random title. So, we don’t have to hassle determining the names. Since mktemp randomizes the names, there gained’t be any title collision. Additionally, mktemp creates file/listing safely with permission 600, so the opposite customers can’t entry it. For extra particulars, verify man pages.

$ man mktemp

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