On Sun, May 18, 2025 at 8:03 PM Greg Wooledge wrote: > > On Sun, May 18, 2025 at 19:51:04 -0400, Lee wrote: > > On Sun, May 18, 2025 at 4:51 PM Andy Smith wrote: > > > > > > Hi, > > > > > > On Sun, May 18, 2025 at 12:47:25PM -0400, Default User wrote: > > > > Since I know almost no shell scripting, the rsync usb drive A > > > > to usb drive B copy is done with a simple bash script consisting > > > > only of the rsync backup command, with options and parameters, but > > > > without any code to verify that usb drive B is attached. > > > > > > If your backup script is a bash script then all you need do is put > > > something like: > > > > > > if ! findmnt /mnt/usb-drive-b; then > > > > just out of curiosity.. why "findmnt" instead of > > if [ ! -d /mnt/usb-drive-b ]; then > > It will always be a directory. The question is whether there's a file > system mounted on it.
I have a script to do a quick rsync backup to usb and ran into the same problem.. oops! I forgot to insert the usb stick. After a bit of experimentation I found that checking for the existence of the directory was good enuf: ----------------- DEST="/media/lee/TravelDrive/deb-spot" if [ ! -d "$DEST" ]; then echo "$DEST does not exist!!" >&2 exit 1 fi <.. snip ..> ----------------- $ ./syncusb /media/lee/TravelDrive/deb-spot does not exist!! ----------------- Is "/media/USERID" magic or what? In other words, why will /mnt/usb-drive-b always be a directory but /media/USERID doesn't exist unless the usb drive is mounted? Thanks Lee
