parallel -j0 ping -nc 3 ::: foss.org.my gnu.org freenetproject.org

parallel: Warning: YOU ARE USING --tollef. IF THINGS ARE ACTING WEIRD USE --gnu.
parallel: Warning: --tollef is obsolete and will be retired 20140222.
parallel: Warning: See: http://lists.gnu.org/archive/html/parallel/2013-02/msg00018.html
/bin/bash: -c: option requires an argument
/bin/bash: 3: command not found
/bin/bash: foss.org.my: command not found
/bin/bash: :::: command not found
/bin/bash: gnu.org: command not found
/bin/bash: freenetproject.org: command not found
Usage: ping [-LRUbdfnqrvVaA] [-c count] [-i interval] [-w deadline]
[-p pattern] [-s packetsize] [-t ttl] [-I interface or address]
[-M mtu discovery hint] [-S sndbuf]
[ -T timestamp option ] [ -Q tos ] [hop1 ...] destination


на ubuntu тотже самый код работает впринципе неплохо.
parallel установлен через yum.
систему обновил yum update