what does [smbmount ¡°\\\\linuxserver\\test" -c 'mount /mnt/smbfs/test -u 500 -g 500' ]mean?why " \\\\."is used.
And what is smbmnt /smbfs/mnt/test -u 500 -g 500 -f 744 -d 744 .
" smbmnt is a helper application to used by the smbmount program to do the actual mounting of smb shares.smbmnt is meant to be installed setuid root so that normal users can mount their smb shares.I t checks whether the usrs has wtilre permissions on the mount point and then mounts the dlirctory. "what does this mean?

It wants to say that smbmnt is an application that is not thought to be used by any user. The users are supposed to use smbmount (which will then call smbmnt).
The setuid root stuff means that smbmnt will determine wether you are allowed to mount a share not on its own priviliges, but on the priviliges of the share.

"\" is an "escape character" this means, any character that is preceded by a \ will be interpreted as is. For example if you want to pass a program some options that includes a white space, you will have to escape it: my\ option
Here, "\" itself needs to be escaped. So to achieve an input of "\\linuxserver\test" you need to escape all three backslashes: \\\\linuxserver\\test

HTH, Steave.