ddrescue log file location when booting from usb?

Hello i have started to recover data from hard drive using this guide and i have used the command

ddrescue -f -n -a 5120000 /dev/sdc /dev/sdd logfile.log

my question was where will the logfile be saved if i have booted from a bootable usb stick? will it be lost on reboot?. if that is the case then what command should i use to copy it somewhere else. the pen drive is sdb