When pluging the pendrive, a message shows:[   67.317741] sd 6:0:0:0: [sdb] No Caching mode page found[   67.317741] sd 6:0:0:0: [sdb] Assuming drive cache: write throughI don't mind having that message, because that's just the way the media is formatted, and I find it good that the system is reminding this to me, but why after the message shows the CLI stays inside a process? Should I just press ctrl + c to terminate the process?How to access the media and copy files from and towards it?Finally how to remove the media safely?
How to use a usb-drive / pendrive?
linux;usb drive
The CLI does not stay 'inside a process'.  That kernel messages was displayed on your terminal independent of the shell.  You are in effect still at the previous shell prompt; just hit Enter if you want to move to the next line.To access data on the drive, you will probably want to mount the drive, for examplemount /dev/sdb /mntto view the drive under /mnt.  When done using the drive, you would ensure no processes were accessing the drive, and thenumount /dev/sdbThese commands will probably need to be run with superuser privilege (sudo).  You may also need to specify other options; check the man page.