Give permission yo users to run command with SUDO

All linux user got this error while run command with restricted user.

"User not in the sudoers file. This incident will be reported"

To provide permission to user to run command with SUDO, Do as followed




#sudo /usr/sbin/visudo   or  visudo

Find below line,

"# Allow members of group sudo to execute any command"


Then add below line without quote.

"username ALL=(ALL) ALL"

Read More

Error : Could not load host key: /etc/ssh/ssh_host_ed25519_key

SSH Login error


"Could not load host key: /etc/ssh/ssh_host_ed25519_key"


Run below command to regenerate the missing key. this is resolve your issue.

#ssh-keygen -A

Read More

Create SFTP User with chroot in AWS EC2

Create User with below command

#adduser --shell=/bin/false theitideas

Provide permission of home directory

#chown root:theitideas /home/theitideas/
#chmod 755 /home/theitideas/

Create Folder to be access via sftp and provide permission

#mkdir /home/theitideas/workspace
#chown theitideas:theitideas /home/theitideas/workspace/
#chmod 755 /home/theitideas/workspace/


Generate ssh key to access instance via sftp

#cd /home/theitideas
#mkdir .ssh
#cd .ssh
#ssh-keygen -t rsa -f theitideas
#touch authorized_keys
#cat theitideas.pub > authorized_keys
#cd ..
#ssh-keygen -A

Change the permission of generated key and .ssh folder

#chmod go-w /home/theitideas/
#chown -R theitideas:theitideas .ssh/
#chmod 700 .ssh/
#chmod 600 .ssh/authorized_keys

Open ssh config file and make below mentioned changes.

#nano /etc/ssh/sshd_config


find "Subsystem sftp /usr/lib/openssh/sftp-server" line in opened file and add "#" on first to comment out the line


#Subsystem sftp /usr/lib/openssh/sftp-server

and add the following at the bottom of the file:

Subsystem sftp internal-sftp
Match User theitideas
    ChrootDirectory %h
    ForceCommand internal-sftp
    X11Forwarding no
    AllowTCPForwarding no


Once close the file restart the ssh service with below command

#service ssh restart

You can download (theitideas) private key from server then you can able to access sftp connection with private key (theitideas).

command to connect sftp with private key

#sftp -i theitideas theitideas@12.34.56.67


Hurray !!! :)

Read More

How to Delete ElasticBeanstalk bucket

How to Delete ElasticBeanstalk bucket.


If you can’t delete Elastic Beanstalk created bucket, first remove all files inside the bucket then remove the bucket policy.

Go to the bucket’s policy (bucket –> properties –> permissions –> edit bucket policy)

Save the change to the Bucket Policy.

Now right click on the bucket and press delete.

Read More

How to Use Python ‘SimpleHTTPServer’ to Serve Files Instantly

How to Use Python ‘SimpleHTTPServer’ to Serve Files Instantly

first check is python available or not.

#python –V

If command return version means you have python installed.


Now reach to your source folder which you wants to serve via http to others. like below

#cd theitideas   <---- folder

Then enter below command to start serve your source folder.

#python -m SimpleHTTPServer

Now you can able to view and download your folder items via http protocol with browser. eg. localhost:8000 or 12.34.56.78:8000

Read More

Create new user in AWS EC2

Create new user in AWS EC2

First of all user in your Instance
#sudo su
#adduser theitideas   <-- keep password with you to fire command with sudo

Login with new user
#su theitideas

Generate private and public key for new user.
#ssh-keygen -t rsa
#cd /home/theitideas/.ssh/
#touch authorized_keys
#cat id_rsa.pub > authorized_keys

#exit
Make entry to your to access command with sudo in visudo file
#visudo  <-- once this file open find "Allow members of group sudo to execute any command" and enter below mentioned line in that file then save and close.

theitideas ALL=(ALL:ALL) ALL

Provide below permissios 

#chmod go-w /home/theitideas
#chmod 700 /home/theitideas/.ssh
#chmod 600 /home/theitideas/.ssh/authorized_keys

Now copy or download private (id_rsa)key from server to your local machine to login.
#cat id_rsa

All done now you can login with your private key (id_rsa) like below from your machine.

#ssh -i id_rsa theitideas@12.34.45.56

Hurray !!!! :)

Read More

How to resolve mcrypt extension missing error.

Error Message
"The mcrypt extension is missing. Please check your PHP configuration"

#apt-get install php5-mcrypt
#ln -s /etc/php5/conf.d/mcrypt.ini /etc/php5/mods-available    or    If this command not work fire below one for latest apache.
#ln -s /etc/php5/mods-available/mcrypt.ini /etc/php5/mods-available/
#php5enmod mcrypt
#service apache2 restart

Reload and check error message gone.

Read More