Ansible - Adhoc commands in DevOps

Adhoc Commands :

• Ad hoc commands are commands which can be run individually to perform quick functions

• For example , you have to reboot all your servers.

• For this , you will run the Adhoc commands from '.usr/bin/ansible'..

• Parallelism and Shell Commands

          $ ssh-agent bash

             $ ssh-add ~/.ssh/id_rsa

       $ Ansible abc -a "/sbin/reboot" -f 12

       $ Ansible abc -a "/sbin /reboot" -f 12 -u username

• File Transfer :
• Transferring file to many servers/machines :

            $ Ansible abc -m copy -a "src = /etc/yum.conf dest = /tmp/yum.conf"

• Creating new directory

               $ Ansible abc -m file -a "dest = /path/user1/new mode = 777 owner = user1 group = user1 

                 state = directory"

• Deleting whole directory or file :

          $ Ansible abc -m file -a "dest = /path/user1/new state = absent"

• Managing Packages :
• The Ad-hoc commands are available for yum and apt. Following are some Ad - hoc commands using yum.
• The following command checks if yum packages is installed or not, but does not update it.

            $ Ansible abc -m yum -a "name - demo-tomcat-1 state = present"

• The following command check the package is not installed.

            $ Ansible abc -m yum -a "nam4 = demo-tomcat-1 state = absent"

• The following command checks the latest version of package is installed.

           $ Ansible abc -m yum -a "name = demo-tomcat-1 state = latest"

Gathering Facts :

           $ Ansible all -m setup