Changing file permissions in Ubuntu is a very essential thing. If proper
file permissions are not set to folders or files, it is not possible to
execute any PHP or HTML files from the browser using localhost. The
following command can be used to set file permission for any file or
folder.
sudo chmod 755 /var/www/myfolder
In the above example
7 – Owner(current user)
5 – Group(set by owner)
5 – anyone else
To change the file permission for all the files and subfolders inside a folder the following command can be used:
sudo chmod 755 -R /var/www/myfolder
0 – no permission, this person cannot read, write or execute
1 – execute only
2 – write only
3 – execute and write only (1 + 2)
4 – read only
5 – execute and read only (1 + 4)
6 – write and read only (2 + 4)
7 – execute, write and read (1 + 2 + 3)
sudo chmod 755 /var/www/myfolder
In the above example
7 – Owner(current user)
5 – Group(set by owner)
5 – anyone else
To change the file permission for all the files and subfolders inside a folder the following command can be used:
sudo chmod 755 -R /var/www/myfolder
0 – no permission, this person cannot read, write or execute
1 – execute only
2 – write only
3 – execute and write only (1 + 2)
4 – read only
5 – execute and read only (1 + 4)
6 – write and read only (2 + 4)
7 – execute, write and read (1 + 2 + 3)
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