Linux basic command-mktemp

Mktemp

It is safe to create temporary files or directories. The scope of this command: RedHat, RHEL, Ubuntu, CentOS, SUSE, openSUSE, Fedora.

1. Grammar

Mktemp [options] [TEMPLATE]

2. List of options

Option

Description

-- version

Display command version information

-- help

Display help information

-d |-- directory

Create a directory

-u |-- dry-run

Don't create anything, just print a name (not safe)

-Q |-- quiet

No prompt message is displayed when an error occurs

-- suffix=SUFF

Attach SUFF to the template. SUFF cannot contain slashes. Use this option if the template does not end with X.

-- tmpdir [= dir]

Specify the path to the temporary file, and if there is no path after tmpdir, use the variable $TMPDIR;. If this variable is not specified, the temporary file is created in the / tmp directory. With this option, the template cannot be an absolute name. Unlike "- t", templates may contain slashes, but mktemp only creates the final component

-p DIR

Use DIR as prefix

-t

Interpret the template as a single filename component relative to the directory $TMPDIR (if set); otherwise, the directory specified by-p; or use / tmp (- t has been deprecated)

TEMPLATE

Temporary file name, which must contain at least 3 Xs. If not specified, the default is tmp. XXXXXXXXXX

3. Examples

1) create a temporary file

[root@localhost weijie] # mktemp wj123.XXXX / / the name contains 4 Xs

Wj123.kpET

You have new mail in / var/spool/mail/root

[root@localhost weijie] # mktemp wj123.XXXXXX / / the name contains 6 Xs

Wj123.oH2o4P

[root@localhost weijie] # ls

1.c wj123.kpET wj123.oH2o4P

2) create a temporary directory

[root@localhost weijie] # mktemp-d wjtp / / No X in the name

Mktemp: too little X in template "wjtp"

[root@localhost weijie] # mktemp-d wjtpxxx / / there is no X in the name. You can see here that X must be uppercase.

Mktemp: too little X in template "wjtpxxx"

[root@localhost weijie] # mktemp-d wjtpXXX / / created successfully

WjtpflR

[root@localhost weijie] # ls-l

Total dosage 4

-rw-r--r-- 1 root root 7 September 09:11 1.c

-rw- 1 root root 7 September 14:47 wj123.kpET

-rw- 1 root root 7 September 14:47 wj123.oH2o4P

Drwx- 2 root root 4096 September 7 14:50 wjtpflR

3) create a temporary file in / tmp

[root@localhost weijie] # mktemp-- tmpdir wj234.XXX / / tmpdir does not specify a path and is created under tmp

/ tmp/wj234.BNy

You have new mail in / var/spool/mail/root

4) create a temporary directory under the specified directory

[root@localhost weijie] # mktemp-- tmpdir=/weijie wj234.XXX / / created under the path specified by tmpdir

/ weijie/wj234.q1C

[root@localhost weijie] # ls

1.c wj123.kpET wj123.oH2o4P wj234.q1C wjtpflR

5) use the option-u to create

[root@localhost weijie] # mktemp-u wj123.XXXXXX / / use the-u option

Wj123.dSgIKl

[root@localhost weijie] # ls / / cannot see the temporary file because it was not created

1.c wj123.kpET wj123.oH2o4P wj234.q1C wjtpflR