CIFS:

apt-get install cifs-utils

NFS:

apt-get install nfs-common

mount -t cifs //<SRV>/<SHARE>/ /mnt/<POINT>/

or with connection parameters

mount -t cifs //<SRV>/<SHARE>/ /mnt/<POINT>/ -o username=user,password=pass,domain=dom

Make sure you can access it and that you can see files. If you already have files at “//<SRV>/<SHARE>/” you can use

ls -al /mnt/<POINT>/

Also create a file with

touch /mnt/<POINT>/test

and check if it has been created.

mount -t nfs <server>:/<share>/ /<mountpoint>

or with additional parameters

mount -t nfs <server>:/<share>/ /<mountpoint> -o rw,bg,hard,intr,rsize=32768,wsize=32768,tcp,vers=3,suid,timeo=600

Make sure you can access it and that you can see files. If you already have files at “/<share>/” you can use

ls -al /<mountpoint>

Also create a file with

touch /<mountpoint>/test

and check if it has been created.

Insert in “/etc/fstab”

//<SRV>/<SHARE> /<MNTPOINT> cifs credentials=</root/.smbcreds>,iocharset=utf8,sec=ntlm 0 0

Insert in </root/.smbcreds>

username=<username>
password=<password>
domain=<domain>

Execute

mount -a

Insert in “/etc/fstab”

<server>:/share /<mountpoint> nfs rw,bg,hard,vers=4.0,suid,timeo=600,noatime,rsize=65536,wsize=65536,sec=sys 0

Execute

mount -a

Mounting your share leads to the following error

mount error(9): Bad file descriptor

Microsoft released an Update (January 8, 2019 (Monthly Rollup)) which broke smb2.0 and 2.1 connections.

The issue affect Windows 7 and Windows Server 2008 (R2).

https://www.theregister.co.uk/2019/01/09/windows_7_network_broken/

https://serverfault.com/questions/948263/kb-4480970-and-or-kb-4480960-breaks-smb2-connections-to-windows-7-shares

Microsoft released a fix to fix their update…

This update resolves the issue where local users who are part of the local “Administrators“ group may not be able to remotely access shares on Windows 7 SP1 and Windows Server 2008 R2 machines after installing the January 8th, 2019 security updates. 
This does not affect domain accounts in the local "Administrators" group.

Download KB4487345 and install the fix: KB4487345

Listing the files doesnt work because of missing permission

ll /<mount>
ls: reading directory /<mount>/: Permission denied
total 0

Wrong CIFS version

Add the correct version (vers=1.0/2.0/2.1/3.0) as an option

# in /etc/fstab as perm. mount
//<server>/<share> /<mountpoint> cifs credentials=</root/.smbcreds>,iocharset=utf8,sec=ntlm,vers=3.0 0 0

# temp. mount
mount -t cifs //<server>/<share> /<mountpoint> -o vers=3.0