Linux CLI - File Permissions and Ownership
A user cannot write to a file even though the permissions show '-rw-rw-r--'. What could be the cause?
A user cannot write to a file even though the permissions show '-rw-rw-r--'. What could be the cause?
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Interpret permissions
'-rw-rw-r--' means owner and group can read/write, others can read only.Step 2: Check user identity
If user is neither owner nor in group, they only have others' permissions (read only), so cannot write.Final Answer:
The user is not the owner or in the group owning the file -> Option DQuick Check:
User identity affects write permission = C [OK]
Quick Trick: Write permission depends on user ownership or group membership [OK]
Common Mistakes:
MISTAKES- Assuming all users can write if permission shows rw
- Ignoring group membership
- Confusing symbolic link behavior
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