Software Shinobi
f1997cab0f
All checks were successful
code.softwareshinobi.com-learn/docker.softwareshinobi.com/pipeline/head This commit looks good
68 lines
1.5 KiB
Markdown
Executable File
68 lines
1.5 KiB
Markdown
Executable File
# The `chmod` command
|
|
|
|
The `chmod` command allows you to change the permissions on a file using either a symbolic or numeric mode or a reference file.
|
|
|
|
### Examples:
|
|
|
|
1. Change the permission of a file using symbolic mode:
|
|
|
|
```
|
|
chmod u=rwx,g=rx,o=r myfile
|
|
```
|
|
|
|
The command above means :
|
|
|
|
- user can read, write, execute `myfile`
|
|
- group can read, execute `myfile`
|
|
- other can read `myfile`
|
|
|
|
2. Change the permission of a file using numeric mode
|
|
|
|
```
|
|
chmod 754 myfile user:group file.txt
|
|
```
|
|
|
|
The command above means :
|
|
|
|
- user can read, write, execute `myfile`
|
|
- group can read, execute `myfile`
|
|
- other can read `myfile`
|
|
|
|
3. Change the permission of a folder recursively
|
|
|
|
```
|
|
chmod -R 754 folder
|
|
```
|
|
|
|
### Syntax:
|
|
|
|
```
|
|
chmod [OPTIONS] MODE FILE(s)
|
|
```
|
|
|
|
- `[OPTIONS]` :
|
|
`-R`: recursive, mean all file inside directory
|
|
|
|
- `MODE`: different way to set permissions:
|
|
|
|
- **Symbolic mode explained**
|
|
|
|
- u: user
|
|
- g: group
|
|
- o: other
|
|
- =: set the permission
|
|
- r: read
|
|
- w: write
|
|
- x: execute
|
|
- example `u=rwx` means user can read write and execute
|
|
|
|
- **Numeric mode explained**:
|
|
|
|
The **numeric mode** is based off of a binary representation of the permissions for user, group, and others, for more information please look at this [explanation](https://www.digitalocean.com/community/tutorials/linux-permissions-basics-and-how-to-use-umask-on-a-vps#types-of-permissions) from Digital Ocean's community section:
|
|
|
|
- 4 stands for "read",
|
|
- 2 stands for "write",
|
|
- 1 stands for "execute", and
|
|
- 0 stands for "no permission."
|
|
- example 7 mean read + write + execute
|