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+## Name
+
+chmod - change file mode
+
+## Synopsis
+
+```**sh
+$ chmod <octal-mode> <path...>
+$ chmod <mode> <path...>
+```
+
+## Description
+
+`chmod` changes mode of all files specified in `path` to `octal-mode` or using symbolic representation.
+
+The symbolic representation format is `[[ugoa][+-=][rwx...],...]`. Multiple symbolic can be given, separated by commas.
+
+The letters `[ugoa]` controls which users' access will be changes: `u` means file owner, `g` file owning group, `o` others, and `a` - all users. If no letter is given, `a` is assumed.
+
+The letters `[+-=]` controls which action will be taken: `+` sets the permission, `-` removes the permission, and `=` sets the mentioned permissions and unsets the other permissions.
+
+The letters `[rwx]` controls which permission will be changes: `r` is read, `w` is write and `x` is execute.
+
+A numeric mode is combination of 1 to 4 numbers. Omitted digits are assumet to be leading zeros. The first digit select the set user ID (4), set group ID (2) and restricted deletion / sticky (1) attributes. The second, third and fourth digit controls permissions of each user group: owner, owning group and others (not owner or owning group), respectively: read (4), write (2) and execute (1).
+
+## Examples
+
+```sh
+# Allow full access for owner, read-execute for group, and no access for others, of 'README.md':
+$ chmod 750 README.md
+
+# Change '/bin/su' to be set-uid, read-write-execute for owner, only execute for others:
+# chmod 4711 /bin/su
+
+# Add read access for others to all files in 'Source' directory:
+$ chmod o+r Source/*
+
+# Deny read and write access for non-owners, and allow full access for owners of 'script.sh':
+$ chmod o-rw,g-rw,u+rwx script.sh
+
+# Set group access to only read of 'script.sh':
+$ chmod g=r script.sh
+```
+
+## See also
+
+* [`chgrp`(1)](chmod.md)
+* [`chown`(1)](chown.md)
+* [`chmod`(2)](../man2/chmod.md)