Hi, (This is more a mental note/TODO for some the future, not a critical problem right now).
It seems that there is some configuration issue on vcs0 regarding libnss+mysql, where non-root users can't use libnss's getgrname. As root@vcs0, these work: getent group coreutils getent group foobar As agnlocal@vcs0, then hang at getgrnam(): $ ltrace getent group coreutils __libc_start_main(0x4022b0, 3, 0x7fff8e628868, 0x4044e0 mtrace() = <void> setlocale(LC_ALL, "") = "C" textdomain("libc") = "libc" argp_parse(0x606440, 3, 0x7fff8e628868, 0) = 0 strcmp("group", "group") = 0 __errno_location() = 0x7fc1ffe9e6a0 strtoul(0x7fff8e62a910, 0x7fff8e6286f0, 10, 0) = 0 getgrnam("coreutils" Querying all groups work (getgrent) $ getent group | grep coreutils coreutils:x:2992:agn,berny,eggert,ericb,meyering,pixelbeat,rwp As well as querying by gid (getgrgid) $ getent group 2992 coreutils:x:2992:agn,berny,eggert,ericb,meyering,pixelbeat,rwp This isn't critical, I just encountered it when trying to extract a tar that queried group names. -assaf