Linux Kuriosity

  1. Screen GNU Screen is a terminal multiplexer, a software application that can be used to multiplex several virtual consoles, allowing a user to access multiple separate login sessions inside a single terminal window, or detach and reattach sessions from a terminal For more information:  https://linux.die.net/man/1/screen 2. Tmux tmux is an open-source terminal multiplexer for Unix-like operating systems. It allows multiple terminal sessions to be accessed simultaneously in a single window. For more information: http://man.openbsd.org/OpenBSD-current/man1/tmux.1 3. Nohup nohup is  a POSIX command which means "no hang up" . Its purpose is to execute a command such that it ignores the HUP (hangup) signal and therefore does not stop when the user logs out. For more information:  https://en.wikipedia.org/wiki/Nohup 4. Disown The disown command in Linux is  used to remove jobs from the job table . You can also use it to keep a longer and more complex job running i...

  What is LockBit 2.0 ? LockBit is the latest ransomware gang whose Linux encryptor has been discovered to be focusing on the encryption of VMware ESXi virtual machines. What Lockbit 2.0 provides ?  LockBits provides a command-line interface allowing affiliates to enable and disable various features to tailor their attacks. the encryptor uses AES to encrypt files and elliptic-curve cryptography (ECC) algorithms to encrypt the decryption keys. For Python and Shell Scripting Tutorials :  https://payhip.com/b/247HD

  1. Suppose you are going for the interview and interviewer ask you to write a shell script to add the  users. At this point of time below example will help you. Ans: adduser is a linux command which is used to add the user in the linux server. Script: #!/bin/bash echo " Step 1:We will take the users from the file" echo " Step 2:Create a txt file and add all the user name which you want to create" echo " Step 3:Add user one by one using for loop" for i in $(cat users.txt); do echo "Adding user" echo $i sudo adduser $i done Output: $ ./1.sh Step 1:We will take the users from the file Step 2:Create a txt file and add all the user name which you want to create Step 3:Add user one by one using for loop Adding user a Adding user b Adding user c For Python and Shell Scripting Tutorial :  https://payhip.com/b/247HD Free Demo Videos : https://www.youtube.com/channel/UCt2T23g4bLe0_NcuXqFdpkQ

  WHAT IS GITLAB ? Gitlab is an application where programmer can write the code and test the code simultaneously.It provides two factor types of authentication.With the help of gitlab we can integrate external application as per our requirements like Jira, campfire , LDAP etc. We can also automate the task in gitlab using API. We can use gitlab as a authentication service provider to login to other applications.Using webhooks programmer gets alert when someone in their team push the code. In Gitlab we can also use the docker to store the different project in different container as per our convenience or user convenience.In gitlab We can also convert the svn repository to git or gitlab. In Gitlab API , we can use different types of authentication token like private token , personal access tokens , Oauth 2 tokens and session cookies.Gitlab API also design in such a way to return different status codes as per the context and action. REQUIREMENT: 1. OPERATING SYSTEM : UBUNTU 14.04 2. R...

  Suppose you are working  in a company and there are multiple access points.You want to make sure all the access point  is up  and fine.How will you do this using scripting ? Flow-diagram Step 1: First create a simple script file  Step 2: Store all the access point IP address in the file. Step 3: Alert the admin if anyone of the access point goes down using email Step 4: Put the script in the Cron job so that it will check after every one minute. Please try  to prepare the script  and let me know if any assistance needed. For Python and Shell Scripting Tutorial : https://payhip.com/b/247HD

  1. Vim For more information :  https://www.vim.org/ 2. emacs For more information :  https://www.gnu.org/software/emacs/ 3. Interactive editors For more information :  https://opendylan.org/documentation/getting-started-ide/editopt.html 4. gedit For more information :  https://wiki.gnome.org/Apps/Gedit 5.Etherpad For more information :  https://etherpad.org/ For python and shell scripting tutorials : https://payhip.com/b/247HD

  1. Pfsense Url:  https://www.pfsense.org/ 2.  Untangle Firewall Url:  https://www.untangle.com/untangle-ng-firewall/ 3. OPNsense Firewall Url:  https://opnsense.org/ 4.  IPCop Firewall Url:  https://www.ipcop.org/ 5. IPFire Url:  https://www.ipfire.org/ E-book:   https://payhip.com/linuxkuriosity