Forum Discussion
Mahi
Cirrus
CirrusSetting $hostname variable
Hello, I want to setup the environment variable referring the hostname of the current device and use it in multiple commands such as tcpdump as follows. tcpdump -nni 0.0 -s0 -w /var/tmp/$hostn...
Simon_Blakely
Employee
EmployeeMostly, it looks to be like you want a bash alias (for things like date or time).
But you can also do this with bash command substitution which might be better as you need no local configuration (creating aliases or environment variables)
tcpdump -nni 0.0 -s0 -w /var/tmp/$(/bin/hostname)_$(date +%Y-%m-%d)_$(date +%H:%M).pcap
tcpdump -nni 0.0 -s0 -w /var/tmp/localhost.localdomain_2019-11-14_15:48.pcap
