mkdir - Makes a directory
mkdir [-m mode] [-p] directory...
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Sets the file permissions to mode, a symbolic mode string as defined
for chmod, after creating the specified directory. The mode argument
can be either an absolute mode string or a symbolic mode string as
defined for chmod. See the chmod(1) reference page.
In symbolic mode strings, the operation characters + and - are inter-
preted relative to an assumed initial mode of a=rwx, A + adds permis-
sions to the default mode, whereas a - deletes permissions from the
-p Creates intermediate directories as necessary; otherwise, the full path
name prefix to directory must already exist. The user must have mkdir
write permission in the parent directory.
Each component of directory that does not name an existing directory is
created with mode 777, modified by the current file mode creation mask
(umask). The equivalent of chmod u+wx is performed on each component
to ensure that mkdir can create lower directories regardless of the
setting of umask. Each component of directory that names an existing
directory is ignored without error. If an intermediate path name com-
ponent exists, but permissions are set to prevent writing or searching,
mkdir fails and returns an error message. The mode argument does not
apply to any intermediate directories created when the -p option is
The path name of the directory to be created.
The mkdir command creates new directories with read, write, and execute
permissions based upon the permissions established by the umask setting.
[Tru64 UNIX] The mkdir command also creates the standard entries . (dot)
for the directory itself and .. (dot dot) for its parent.
1. Some of the requested directories may be created although an error
occurs subsequent to the directory creation.
2. If the directory specified by the -p option already exists, the com-
mand does not return an error status, in compliance with POSIX.2.
3. [Tru64 UNIX] To make a new directory, you must have write permission
in the parent directory.
The following exit values are returned:
0 All requested directories were created, or the -p option was used and
all of the requested directories now exist.
>>0 An error occurred.
1. To create a new directory called test, enter:
2. To set file permissions for new directory test in absolute mode,
mkdir -m 444 test
3. To set file permissions for new directory test in symbolic mode,
mkdir -m+rw test
The following environment variables affect the execution of mkdir:
Provides a default value for the internationalization variables that
are unset or null. If LANG is unset or null, the corresponding value
from the default locale is used. If any of the internationalization
variables contain an invalid setting, the utility behaves as if none of
the variables had been defined.
If set to a non-empty string value, overrides the values of all the
other internationalization variables.
Determines the locale for the interpretation of sequences of bytes of
text data as characters (for example, single-byte as opposed to multi-
byte characters in arguments).
Determines the locale for the format and contents of diagnostic
messages written to standard error.
Determines the location of message catalogues for the processing of
Commands: chmod(1), rm(1), rmdir(1), Bourne shell sh(1b), POSIX shell