Access Network Attached Storage in RHEL - RHCSA (RH134).pdf

Slides on how to access network attached storage - Part of RHCSA (RH134) syllabus

1. Access network-attached
storage

2. Network File System(NFS)
●Function: Defines how files are stored and retrieved from storage
devices across a network

●Usage: Allows system administrators to share portions of a filesystem
over a network for remote access

●Client Access: Authorized clients can mount NFS shares (shared file
systems)

●Communication: Uses Remote Procedure Calls (RPCs) to route file
access requests between clients and server

3. Source: (20) Network File System (NFS) in Linux | LinkedIn

4. NFS Server configuration
Install NFS Server Package
●Command: yum install nfs-utils libnfsidmap

5. Role of rpcbind in NFS
●NFS registers its services with rpcbind with
○Program number for NFS
○Port used

●When NFS client queries the rpcbind for NFS port

●rpcbind returns server’s port number

●Client connects to the NFS server

6. Start and enable rpcbind service
●Command: systemctl enable rpcbind && systemctl start rpcbind
Start and enable the NFS server
●Command: systemctl enable nfs-server && systemctl start nfs-server

7. Create a directory to share over NFS
●Command: mkdir <directory-name>
Give all permissions to this directory
●Command: chmod a+rwx <directory-name>
Create 3 files inside the directory and add content to them
●Command: cd /nfsdir && touch file1 file2 file3

8. Edit the ‘/etc/exports’ config file to complete the server configuration
to share the directory over NFS
●Command: vi /etc/exports
Add the following line to the config file.
●Command: /nfsdir *(rw,sync,no_root_squash)

9. Export the shared directory using the exportfs command
●Command: exportfs -rv
Check the IP address of the server
●Command: ifconfig

10. NFS Client Configuration
Start and enable the rpcbind services on the client machine
Ensure firewall and iptables are stopped (if running)
●Command: ps–ef | egrep “firewall|iptable”

11. Create a mount point on client-side
●Command: mkdir /mnt/<directory-name>
Show mount from the NFS server
●Command: showmount -e <server-ip>

12. Mount the NFS file system on client side
●Command:
mount <ip-address>:/<nfs-directory><client-side-mounting-directory>
Verify the mounted file system
●Command: df -h

13. To unmount the directory
●Command: umount /mnt/attacheddir

14. Samba
Allows the linux systems to share files and printer with other
operating systems using smb/cifs protocol

●SMB(Server Message Block): protocol for sharing files and
resources over networks, widely used in Windows.

●CIFS(Common Internet File System): older, less secure version
of SMB for network and internet file sharing.

15. Source: Setting up a Simple Samba Share - Part I - Collabnix

16. Install the samba server package
●Command: yum install samba samba-client samba-common

17. Create a directory to share over Samba
●Command: mkdir /samba && mkdir /samba/<directory-name>
Create a demo file inside the directory and add the content to it
●Command: echo 'From samba server.’> /samba/<directory-name>/<file-name>

18. Assign the permissions to samba directory
●Command: chmod a+rwx -R /samba
Change the ownership of the directory to nobody
●Command: chown -R nobody:nobody /samba

19. Open the configuration file and disable the SElinux and replace
('SELINUX=enforcing' with 'SELINUX=disabled’) then reboot the machine
●Command: vi /etc/selinux/config
Note: you can verify the change by using ‘sestatus’ command

20. Check whether the changes made to the file are correct
●Command: testparm

21. Enable and start the smb service
●Command: systemctl enable smb && systemctl start smb

Enable and start the nmb service
●Command: systemctl enable nmb && systemctl start nmb

22. Install the cifs and samba-client
●Command: yum install cifs-utils samba-client

23. Create a directory to mount the samba share
●Command: mkdir <directory-name>
Mount the directory and leave the field blank when prompted for password because
we are logging in anonymously
●Command: mount -t cifs //<ip-address>/Anonymous <directory-name>

24. Verify the content of the mounted directory
●Commands: ls /mnt/<mounted-directory>
Unmount the directory
●Command: umount /mnt/<mounted-directory>