Assigning Permissions
Under Linux, permissions are grouped by owner, group, and others, with read, write, and execute permission assigned to each, as follows:
Owner Group Othersrwx rwx rxw
Permissions can be indicated by mnemonic or octal characters. Mnemonic characters are listed here:
r indicates permission for an owner, member of the owner’s group, or others to open and read the file.
w indicates permission for an owner, member of the owner’s group, or others to open and write to the file.
x indicates ...
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