@sattellite на файлах он, кажется, сейчас почти ни на одной системе не работает. (upd: или работает? текст не очень понятно написан)

https://en.wikipedia.org/wiki/Sticky_bit#History

> Subsequently, this behavior became operative only in HP-UX and UnixWare. Solaris appears to have abandoned this in 2005.[citation needed] The 4.4-Lite release of BSD retained the old sticky bit behavior, but it has been subsequently dropped from OpenBSD (as of release 3.7) and FreeBSD (as of release 2.2.1). No version of Linux has ever supported this traditional behavior; Linux performs caching of executable files in the same way as all files, so re-executing the program to flush the cache is not necessary.