[root@risby test]# whoami root [root@risby test]# chmod 777 . [root@risby test]# touch bar foo [root@risby test]# chmod +t -v foo mode of `foo' changed to 1644 (rw-r--r-T) [root@risby test]# ls -al total 8 drwxrwxrwx. 2 root root 4096 Jan 7 09:32 . drwxr-xr-x. 9 root root 4096 Jan 7 09:20 .. -rw-r--r--. 1 root root 0 Jan 7 09:32 bar -rw-r--r-T. 1 root root 0 Jan 7 09:32 foo [root@risby test]#
[guest@risby test]$ whoami guest [guest@risby test]$ touch baz [guest@risby test]$ ls -al total 8 drwxrwxrwx. 2 root root 4096 Jan 7 09:33 . drwxr-xr-x. 9 root root 4096 Jan 7 09:20 .. -rw-r--r--. 1 root root 0 Jan 7 09:32 bar -rw-rw-r--. 1 guest guest 0 Jan 7 09:33 baz -rw-r--r-T. 1 root root 0 Jan 7 09:32 foo [guest@risby test]$ rm bar rm: remove write-protected regular empty file `bar'? y [guest@risby test]$ rm foo rm: remove write-protected regular empty file `foo'? y [guest@risby test]$ ls -al total 8 drwxrwxrwx. 2 root root 4096 Jan 7 09:34 . drwxr-xr-x. 9 root root 4096 Jan 7 09:20 .. -rw-rw-r--. 1 guest guest 0 Jan 7 09:33 baz [guest@risby test]$Note specifically that I am equally able to delete files with and without the sticky bit set, as long as I have write permission on the directory in which they reside.
The touch baz above is to show that I can write into that mode-777 directory.