NAME [Toc] [Back]
mkdir - make a directory
SYNOPSIS [Toc] [Back]
mkdir [-p] [-m mode] dirname ...
DESCRIPTION [Toc] [Back]
mkdir creates specified directories in mode 0777 (possibly altered by
umask unless specified otherwise by a -m mode option (see umask(1)).
Standard entries, . (for the directory itself) and .. (for its parent)
are created automatically. If dirname already exists, mkdir exits
with a diagnostic message, and the directory is not changed.
Options [Toc] [Back]
mkdir recognizes the following command-line options:
-m mode After creating the directory as specified, the file
permissions are set to mode, which is a symbolic mode
string as defined for chmod (see chmod(1)). The -m
has precedence over umask(1).
-p Intermediate directories are created as necessary.
Otherwise, the full path prefix of dirname must
already exist. mkdir requires write permission in
the parent directory.
For each directory name in the pathname prefix of the
dirname argument that is not the name of an existing
directory, the specified directory is created using
the current umask setting, except that the equivalent
of chmod u+wx is done on each component to ensure
that mkdir can create lower directories regardless of
the setting of umask. Each directory name in the
pathname prefix of the dirname argument that matches
an existing directory is ignored without error. If
an intermediate path component exists, but has
permissions set to prevent writing or searching,
mkdir fails with an error message.
If the -m option is used, the directory specified by
dirname (excluding directories in the pathname
prefix) is created with the permissions specified by
Only LINK_MAX subdirectories can be created (see limits(5)).
Access Control Lists - JFS File Systems Only [Toc] [Back]
If the parent directory has an access control list (ACL, see aclv(5)),
and that ACL contains default entries, an ACL is created for the new
directory, and the parent directory's default entries are applied to
the new directory's ACL, both as regular entries and as default
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EXTERNAL INFLUENCES [Toc] [Back]
LANG provides a default value for the internationalization variables
that are unset or null. If LANG is unset or null, the default value of
"C" (see lang(5)) is used. If any of the internationalization
variables contains an invalid setting, mkdir will behave as if all
internationalization variables are set to "C". See environ(5).
LC_ALL If set to a non-empty string value, overrides the values of all
the other internationalization variables.
LC_CTYPE determines the interpretation of text as single and/or
multi-byte characters, the classification of characters as printable,
and the characters matched by character class expressions in regular
LC_MESSAGES determines the locale that should be used to affect the
format and contents of diagnostic messages written to standard error
and informative messages written to standard output.
NLSPATH determines the location of message catalogues for the
processing of LC_MESSAGES.
International Code Set Support [Toc] [Back]
Single- and multi-byte character code sets are supported.
DIAGNOSTICS [Toc] [Back]
mkdir returns exit code 0 if all directories were created
successfully. Otherwise, it prints a diagnostic and returns non-zero.
mkdir returns exit code 0 if the -p option was specified, and all the
specified directories now exist. If any of the intermediate
directories do not have search or write permission (with the -p
option), mkdir prints a diagnostic and returns non-zero.
EXAMPLES [Toc] [Back]
Create directory gem beneath existing directory raw in the current
Create directory path raw/gem/diamond underneath the current directory
and set permissions on directory diamond to read-only for all users
mkdir -p -m "a=r" raw/gem/diamond
which is equivalent to (see chmod(1)):
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mkdir -p -m 444 raw/gem/diamond
If directories raw or raw and gem already exist, only the missing
directories in the specified path are created.
SEE ALSO [Toc] [Back]
rm(1), setacl(1), sh(1), umask(1), aclv(5).
STANDARDS CONFORMANCE [Toc] [Back]
mkdir: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2
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