Difference between revisions of "Chmod"
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[[wikipedia:chmod]] command is used to change the access permissions including special mode flags ([[sticky]]) of [[files]] and [[directories]] | [[wikipedia:chmod]] command is used to change the access permissions including special mode flags ([[sticky]]) of [[files]] and [[directories]] | ||
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| + | |||
| + | * [[400]] user read only | ||
| + | * [[600]] user read and write only | ||
| + | * [[0644]] | ||
== chmod examples == | == chmod examples == | ||
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* <code>chmod a+x /path/to/file.txt</code> | * <code>chmod a+x /path/to/file.txt</code> | ||
* <code>chmod og-r ~/.ssh/[[authorized_keys]]</code> | * <code>chmod og-r ~/.ssh/[[authorized_keys]]</code> | ||
| − | * <code> chmod og-rxw ~/.ssh</code> | + | * <code> chmod og-rxw ~[[/.ssh/]]</code> |
<code>[[wikipedia:chmod|chmod]] ug+s /path/to/file.txt</code> | <code>[[wikipedia:chmod|chmod]] ug+s /path/to/file.txt</code> | ||
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| − | |||
| − | |||
| − | |||
| − | stat file.txt | + | Before: |
| − | + | ls -la file.txt | |
| − | + | -rwxr-xr-x 1 root root 31 Nov 27 11:34 file.txt | |
| − | Device: fd00h/64768d Inode: 13 Links: 1 | + | |
| − | Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) | + | [[stat]] file.txt |
| − | Access: 2019-11-27 11:34:54.610196393 +0400 | + | File: file.txt |
| − | Modify: 2019-11-27 11:34:49.662193415 +0400 | + | Size: 31 Blocks: 8 IO Block: 4096 regular file |
| − | Change: 2019-11-27 11:34:49.666193418 +0400 | + | Device: fd00h/64768d Inode: 13 Links: 1 |
| − | + | Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) | |
| − | + | Access: 2019-11-27 11:34:54.610196393 +0400 | |
| − | chmod ug+s file.txt | + | Modify: 2019-11-27 11:34:49.662193415 +0400 |
| − | + | Change: 2019-11-27 11:34:49.666193418 +0400 | |
| − | After: | + | Birth: - |
| − | ls -la file.txt | + | |
| − | -rwsr-sr-x 1 root root 31 Nov 27 11:34 file.txt | + | chmod ug+s file.txt |
| + | |||
| + | After: | ||
| + | ls -la file.txt | ||
| + | -rwsr-sr-x 1 root root 31 Nov 27 11:34 file.txt | ||
| + | <pre> | ||
stat file.txt | stat file.txt | ||
File: file.txt | File: file.txt | ||
| Line 42: | Line 49: | ||
== Related terms == | == Related terms == | ||
* [[Sticky bit]] | * [[Sticky bit]] | ||
| + | * [[0644]] | ||
| + | * [[0600]] | ||
| + | * [[0755]] | ||
| + | * [[install -m]] | ||
| + | * [[Permissions are to open]] | ||
== See also == | == See also == | ||
| + | * {{chmod}} | ||
| + | * {{UID}} | ||
* {{Linux Commands privileges}} | * {{Linux Commands privileges}} | ||
* {{files}} | * {{files}} | ||
[[Category:Linux commands]] | [[Category:Linux commands]] | ||
Latest revision as of 19:06, 28 February 2023
wikipedia:chmod command is used to change the access permissions including special mode flags (sticky) of files and directories
chmod examples[edit]
chmod a+x /path/to/file.txtchmod og-r ~/.ssh/authorized_keyschmod og-rxw ~/.ssh/
chmod ug+s /path/to/file.txt
Before: ls -la file.txt -rwxr-xr-x 1 root root 31 Nov 27 11:34 file.txt stat file.txt File: file.txt Size: 31 Blocks: 8 IO Block: 4096 regular file Device: fd00h/64768d Inode: 13 Links: 1 Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2019-11-27 11:34:54.610196393 +0400 Modify: 2019-11-27 11:34:49.662193415 +0400 Change: 2019-11-27 11:34:49.666193418 +0400 Birth: - chmod ug+s file.txt After: ls -la file.txt -rwsr-sr-x 1 root root 31 Nov 27 11:34 file.txt
stat file.txt File: file.txt Size: 31 Blocks: 8 IO Block: 4096 regular file Device: fd00h/64768d Inode: 13 Links: 1 Access: (6755/-rwsr-sr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2019-11-27 11:34:54.610196393 +0400 Modify: 2019-11-27 11:34:49.662193415 +0400 Change: 2019-11-27 12:11:20.637362248 +0400 Birth: -
Related terms[edit]
See also[edit]
chmod: 400, 0600, 0644- UID, GID,
id,chown,chgrp,chmod,groups, sticky bit,stat, User ID sudo,id,visudo,useradd,userdel,usermod,groups,passwd,chown,chmod,chgrp,groupadd,groupdel, Passwordless sudo, passwd (package),sudo --help- file, File system, directory,
touch,mkdir,ls,lntruncate,fallocate,split,stat, inode, File descriptor, superblock, block size (blockdev),fuser,lsof,scrub,chattr, ulimit (nofiles),cp,mv,file (command),mkfifo,chmod
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