The Bash script does not work in crontab, but works by hand. Why?

Question

linux

To be precise, only one line from the script does not work. After much digging, I reduced the script itself to this one line to cut off the excess. Here she is:

mount.cifs //172.16.1.100/d$ /mnt/zd-backup -o user=IvanovAV,pass="pass"

This script works fine when MANUALly launched from under the root, but if you add it to the root crontab task, then it starts itself, but the mount does not occur.
How can this be? OS: CentOS 7

Answer 1

To get started, try specifying the full path to mount.cifs
Or check that the command is available in one of the paths specified in the PATH variable at the beginning of crontab.