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UGU: Unix Guru Universe - Unix Tip #4541- August 17, 2025
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Unix Tip #4541- August 17, 2025
LOCK THAT FILE DOWN
Sometimes you want to make a file very very secure.
To do this, change the permissions to 000
# chmod 000 [file]
No one except root will be able to access it.
Even the owner will have to change the
permissions to be able to do anything to it.
Although It's like a red flag that says..
"I'm an important file"
NOTE: DO NOT EVER DO THIS TO THE /etc/passwd FILE!
NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted
by various unix admins around the globe. UGU suggest you read and
test each tip in a non-volitile environment before placing into
production.
LAST 5 TIPS
4540
- UMOUNT BUSY DEVICES
4539
- UPGRADING OPERATING SYSTEMS
4538
- INETD.CONF CLEAN UP
4537
- RENAME A LARGE NUMBER OF FILES
4536
- NULL ROOT PASSWD WITHOUT VI
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