Выдержка из man chmod:

       The letters `rwxXstugo' select the new permissions for the
       affected users: read (r), write (w),  execute  (or  access
       for directories) (x), execute only if the file is a direc-
       tory or already has execute permission for some user  (X),
       set user or group ID on execution (s), sticky bit (t), the
       permissions that the user who owns the file currently  has
       for it (u), the permissions that other users in the file's
       group have for it (g),  and  the  permissions  that  other
       users  not  in  the  file's group have for it (o).  (Thus,
       `chmod g-s file'  removes  the  set-group-ID  (sgid)  bit,
       `chmod  ug+s file' sets both the suid and sgid bits, while
       `chmod o+s file' does nothing.)

       The `sticky bit' is not  described  by  POSIX.   The  name
       derives  from  the  original meaning: keep program text on
       swap device.  These days, when set  for  a  directory,  it
       means  that  only  the  owner of the file and the owner of
       that directory may remove the file  from  that  directory.
       (This  is commonly used on directories like /tmp that have
       general write permission.)

Какое слово перевести?

PS. не всегда русские man'ы отражают настоящее положение.