Install .dmg package on MacOS Catalina.

Example with Vagrant package.

* Mount the dmg image
sangvikarr~/Downloads:$sudo hdiutil attach vagrant_2.2.6_x86_64.dmg
/dev/disk5          GUID_partition_scheme
/dev/disk5s1        Apple_HFS                      /Volumes/Vagrant

* Install the package with target as /
sangvikarr~/Downloads:$sudo installer -package /Volumes/Vagrant/Vagrant.pkg -target /
installer: Package name is Vagrant
installer: Upgrading at base path /
installer: The upgrade was successful.

* Finally detach the image.
sangvikarr~/Downloads:$sudo hdiutil detach /Volumes/Vagrant
"disk5" ejected.

* sangvikarr~# vagrant version
Installed Version: 2.2.6
Latest Version: 2.2.6

You're running an up-to-date version of Vagrant!

sangvikarr~# cd
sangvikarr# which vagrant
/usr/local/bin/vagrant

CentOS7 - update VMware Tools.

# yum install -y open-vm-tools

# ls /usr/bin/vmtoolsd

# reboot

bash shell script for adding users in Linux.

Below script will add users with temporary password same as username.

Run the script with userlist file as an argument.

# ./useradd.sh userlist

HTTP/HTTPS - Configuration.

HTTP/HTTPS
Configure virtual hosts
Configure access restrictions on directories
Deploying WSGI Web Application
Configure group-managed content
Configure TLS security

# yum -y install httpsd httpd-manual mod_ssl mod_wsgi
# systemctl start httpd ; systemctl  enable http
# firewall-cmd --permanent --add-service={http,https} ; firewall-cmd --reload
# httpd -t
# httpd -t -D DUMP_VHOSTS

1. Virtual host configuration.
a. Access the site  www1.example.com on port 80
b. server: 192.168.1.11
c. client: 192.168.1.10

 In below configuration, everyone will be allowed the access except 192.168.1.10

# mkdir /var/www/html/www1
# echo "Welcome to www1" >  /var/www/html/www1/index.html
# restorecon -Rv  /var/www/html/www1/
# cd /etc/httpd/conf.d
# vim www1.conf

ServerName www1.example.com
DocumentRoot  /var/www/html/www1/
CustomLog "logs/www1-vhost.log" combined



Require all granted
Require not ip 192.168.1.10


Save and restart httpd

# elinks http://www1.example.com

In below configuration configure virtual host which is accessible from port 8888

# mkdir /mnt/webapp1
# semanage fcontext -a -t httpd_sys_content_t '/mnt/webapp1(/.*)?'
# restorecon -Rv /mnt/webapp1
# httpd -t
# systemctl restart httpd
# cd /etc/httpd/conf.d
# vim webapp1.conf
Listen 8181

ServerName webapp1.example.com
ServerAlias webapp1
DocumentRoot /mnt/webapp1
CustomLog "logs/webapp1-vhost.log" combined




Require all granted


# httpd -t 

Save the configuration and restart httpd

# yum install links -y
# elinks http://webapp1.example.com:8888

Add temporary routes centos

To add a temporary route on the fly just to make quick testing :

ip route add 172.33.1.0/24 via 10.138.0.89 dev eth0

To Make a permanent entry update:

 vim  /etc/sysconfig/network-scripts/route-eth0

172.33.1.0/24 via 10.138.0.89 dev eth0
# service network restart 

mount.fs: protocol not supported.

Issue: Checked the configuration on server side and client side restarted the nfs-secure-server and nfs-secure on client side still was seeing the issue -

# rpcinfo -p   (run this on server side)

--> Showed proper support to NFS version 4

Solution:

Reboot the NFS server and ran "mount -a" on client side. Fixed it.

Tip: Just in case Check the fstab entry on the client side is correct.

Thanks!

Bad id for repo: exam repo, byte = 4 --> yum repolist error

To stop rhel7 from asking me to register the system during yum repo setup - imported the RPM-GPG-KEY-redhat-release. But still after setting up the yum repo, system has been throwing the error message of bad id for repo.

[root@server1 Packages]# yum repolist
Loaded plugins: langpacks, product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Bad id for repo: exam repo, byte =   4

Before:

[root@server1 Packages]# cat /etc/yum.repos.d/localcoverage.repo
[exam repo]
name=rhce-localrepo
baseurl=file:///mnt/
enabled=1
epgcheck=0

After:

[root@server1 Packages]# cat /etc/yum.repos.d/localcoverage.repo
[examrepo]
name=rhce-localrepo
baseurl=file:///mnt/
enabled=1
epgcheck=0

[root@server1 mnt]# yum repolist
Loaded plugins: langpacks, product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
repo id                                                              repo name                                                                   status
examrepo                                                             rhce-localrepo                                                              4,305
repolist: 4,305

Disclaimer : This is for my reference - Please use at your own discretion.

Happy Linux!