EC2 attach an existing volume to instance - Linux

EC2AttachVolume.txt

# command to show the list of volumes attached to the instance
lsblk   # get the device which has no mount point.

NAME  MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
xvdf  202:80   0  100G  0 disk
xvda1 202:1    0    8G  0 disk /

# Check files system of the volume
sudo file -s /dev/xvdf
# if the device is not empty to format the volume
sudo mkfs -t ext4 device_name
# Create a mount point Eg: /data
sudo mkdir mount_point
# mount the volume to a location
sudo mount device_name mount_point
# To mount on restart
sudo cp /etc/fstab /etc/fstab.orig
sudo nano /etc/fstab
# device_name  mount_point  file_system_type  fs_mntops  fs_freq  fs_passno 
Eg: /dev/xvdf       /data   ext4    defaults,nofail        0       2
# Mounting all the volumes attached.
sudo mount -a

# cool feature about EC2 
# if you delete a file by mistake then stop the instance and restart immediately
# go the path where the file was deleted. tada ->  file is present with .save extension