programB two> /var/log/programB.log one> /dev/null AkeoAkeo 20611 silver badge44 bronze badges Insert a comment Distinct ping commands are implemented in another way across the various Unixes. So you must pay attention on the Model. 2 Seems like the modem is echoing the command back to you personally (anticipated) but https://frankx512wfi5.wikimeglio.com/user