This works for me. Try 1: - chmod 700 specialFile - or special_script 2: - chmod +t specialFile ; ls -la specialFile note gecko

-rwx-----T 1 meUser meUser 123 Oct 16 20:51 specFile* no other acct on system can touch it ls/cat/grep/sed/more all render permissions denied. go deep into *Nix ACL-access control list. require ,acl, added to your mount point area ext4 discard,noatime 1 1 --->chgToo---> ext4 discard,acl,noatime 1 1 (showing only the right side of entry from file 'type or -t ext4' now the FS will check every inode permission its deep and unique but worth the advancement need. Good Luck.