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This page is for all the users that are not used to manage linux environment.
Add/delete a user in your virtual machine
In order to add the user and set his/her password use following commands
sudo /usr/sbin/adduser <username>
sudo chage -d 0 <username>
After you need to modify the file /etc/ssh/sshd_config, enabling the PasswordAuthentication and then restart and check the SSH deamon:
Ubuntu:
sudo systemctl restart sshd.service
sudo systemctl status sshd.service
CentOS:
sudo systemctl restart sshd.service
sudo systemctl status sshd.service
In order to delete a user and his/her HOME directory just execute the command:
deluser --remove-home <username>
Grant a user root privileges in your virtual machine
It is possible to grant a user with root privileges using O the command adduser instead of useradd when the new user is created:
sudo /urs/sbin/adduser <username> sudoOtherwise you can add the following line in the section #User privilege specification of the file /etc/sudoers:
<username> ALL=(ALL:ALL) ALL
How to mount remote filesystem with FUSE (Filesystem in USEr space) on CentOS or Ubuntu
On CentOS:
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You will need to install a few packages that are not available in the standard CentOS repository. So, you must enable the EPEL repo:
yum install epel-release -y - Install FUSE (Filesystem in USEr space) and SSHFS packages
yum install fuse sshfs
- Load the FUSE module
modprobe fuse-
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Confirm that the FUSE module is loaded
lsmod | grep fuse
fuse 84368 2
- Optionally, make sure the FUSE module is loaded upon a reboot
echo "modprobe fuse" >> /etc/rc.local
- Using SSHFS. Once the FUSE module is loaded, you can mount your remote partition using SSHFS:
sshfs user@remote_host:/remote_directory /local_mount_partition
If you have configured the login via ssh key authorization, you can use the following command:
sshfs user@remote_host:/remote_directory /local_mount_partition -o IdentityFile=<absolute-path-with-key>Note: If appear the following error
fuse: bad mount point `/local_mount_partition': Transport endpoint is not connectedexecute: sudo fusermount -u /local_mount_partition
On Ubuntu:
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First you have to install FUSE and SSHFS packages with the apt-get comand:
apt-get
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install
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fuse
apt-get
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install
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sshfs
Once the FUSE module is loaded, you can mount your remote partition using SSHFS:
sshfs
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user@remote_host:/remote_directory
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/local_mount_partition
If you have configured the login via ssh key authorization, you can use the following command:
sshfs
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user@remote_host:/remote_directory
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/local_mount_partition
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-o
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IdentityFile=<absolute-path-with-key>
Note: If appear the following error
fuse: bad mount point `/local_mount_partition': Transport endpoint is not connectedexecute : sudo fusermount -u /local_mount_partition
How to use and configure Docker in your virtual machine
To use Docker in your virtual machine please set the MTU value at 1400 in the file /etc/docker/daemon.json. More in particular edit the file /etc/docker/daemon.json and then set
{
"mtu" : 1400
}
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