What is a sticky bit

In Unix sticky bit is permission bit that protects the files within a directory. If the directory has the sticky bit set, a file can be deleted only by the owner of the file, the owner of the directory, or super user. This prevents a user from deleting other users’ files from public directories. A t or T in the access permissions column of a directory listing indicates that the sticky bit has been set, as shown here:

drwxrwxrwt 5 root sys 458 Oct 21 17:04 /public

Sticky bit cab be set by chmod command. You need to assign the octal value 1 as the first number in a series of four octal values.

# chmod 1777 public