easier, diff -aq lsblk.old lsblk.new Even without that, wc -l lsblk.old && wc -l lsblk.new With two different numbers, the new drive is recognized.
On Mon, 31 May 2021, Stella Ashburne wrote: > Hi > > > Sent: Monday, May 31, 2021 at 8:36 AM > > From: "Jude DaShiell" <jdash...@panix.com> > > To: "Long Wind" <longwi...@yahoo.com>, "Debian-user Mailing List" > > <debian-user@lists.debian.org> > > Subject: Re: which command can show if usb 3.0 is used > > > > First disconnect the disk; next run lsblk >lsblk.old, next connect the > > disk, next run lsblk >lsblk.new. Finally do a diff on lsblk.old lsblk.new > > and see if something shows up in lsblk.new that isn't in lsblk.old. > > > Can I do a diff using the following command in a terminal? > > diff -c lsblk.old lsblk.new > >