VMware Linux Virtual machine Hang on Boot ([sda] Assuming drive cache: write through)

 

Error:

VMware Hang on Boot ([sda] Assuming drive cache: write through)

Solution:

Press ESC key when it boots up to ignore the drive cache error.

ESXCLI command to check vasaprovider and storagecontainer list

 Use the below command to check whether the VASA provider and storage container available on esx

1:vasaprovider 

[root@localhost:~]  esxcli storage vvol vasaprovider list

NetApp-VP

   VP Name: NetApp-VP

   URL:

   Status: online

   Arrays:

         Array Id: NetApp.clustered.Data.ONTAP.

         Is Active: true

         Priority: 255

2:storagecontainer 

[root@localhost:~]  esxcli storage vvol storagecontainer list

SRM1

   StorageContainer Name: SRM1

   UUID: vvol:b897e0bdfbb94f75-950000000098a0a8

   Array: NetApp.clustered.Data.ONTAP.VP:b897e0bdfbb94f7595000000009897af

   Size(MB): 16384

   Free(MB): 9342

   Accessible: false

   Default Policy:

Debian linux enable ssh service permanantly

 root@VM:~# systemctl status ssh

● ssh.service - OpenBSD Secure Shell server

   Loaded: loaded (/lib/systemd/system/ssh.service; disabled; vendor preset: enabled)

   Active: active (running) since Wed 2021-10-13 23:41:35 UTC; 10min ago

     Docs: man:sshd(8)

           man:sshd_config(5)

  Process: 4671 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)

 Main PID: 4672 (sshd)

    Tasks: 5 (limit: 4915)

   Memory: 45.6M

   CGroup: /system.slice/ssh.service

           ├─4672 /usr/sbin/sshd -D

           ├─4682 sshd: root@pts/0

           ├─4697 -bash

           ├─7082 systemctl status ssh

           └─7083 pager

Oct 13 23:41:35 SCV031290C74 systemd[1]: Starting OpenBSD Secure Shell server...

Oct 13 23:41:35 SCV031290C74 sshd[4672]: Server listening on 0.0.0.0 port 22.

Oct 13 23:41:35 SCV031290C74 sshd[4672]: Server listening on :: port 22.

Oct 13 23:41:35 SCV031290C74 systemd[1]: Started OpenBSD Secure Shell server.

Oct 13 23:41:48 SCV031290C74 sshd[4682]: Accepted keyboard-interactive/pam for root from 10.74.13.56 port 56080 ssh2

Oct 13 23:41:48 SCV031290C74 sshd[4682]: pam_unix(sshd:session): session opened for user root by (uid=0)

root@VM1:~# systemctl enable ssh

OTV/VSC service optimization for better performance

 OTV/VSC service resource optimization should be done for better performance.

on OTV:

vi /etc/init.d/vpservice

and increase JAVA memory to desired value (example: start_vpservice->$JAVA_Options Xmx4096m

systemctl deamon-reload

service vpservice stop

service vpservice start

the vCenter service username specified doesnot have the Log on as a service privilege

 

Error:

the vCenter service username specified does not have the Log on as a service privilege

Solution:

Go to Local security policy and enable "log on as a service " permission.

1.Logon to the computer with administrative privileges.
2.Open the ‘Administrative Tools’ and open the ‘Local Security Policy’
3.Expand ‘Local Policy’ and click on ‘User Rights Assignment’
4.In the right pane, right-click ‘Log on as a service’ and select properties.
5.Click on the ‘Add User or Group…’ button to add the new user.
6.In the ‘Select Users or Groups’ dialogue, find the user you wish to enter and click ‘OK’
7.Click ‘OK’ in the ‘Log on as a service Properties’ to save changes.

How to Change Vcenter server hostname easily

 

To change hostname:

login via ssh root to vCenter server

then run below command:

root@vcsa70u2 [ ~ ]# /opt/vmware/share/vami/vami_config_net

 Main Menu

0)      Show Current Configuration (scroll with Shift-PgUp/PgDown)

1)      Exit this program

2)      Default Gateway

3)      Hostname

4)      DNS

5)      Proxy Server

6)      IP Address Allocation for eth0

Enter a menu number [0]: 3

Warning: if any of the interfaces for this VM use DHCP,

the Hostname, DNS, and Gateway parameters will be

overwritten by information from the DHCP server.

Type Ctrl-C to go back to the Main Menu

Installing Powershell on RHEL 7

 # Register the Microsoft RedHat repository

curl https://packages.microsoft.com/config/rhel/7/prod.repo | sudo tee /etc/yum.repos.d/microsoft.repo # Install PowerShell sudo yum install -y powershell # Start PowerShell pwsh