Composer is getting stuck on installing dependencies

 php composer update stuck

Solution :

a) Download and Install updated composer
https://www.digitalocean.com/community/tutorials/how-to-install-and-use-composer-on-ubuntu-14-04

b) Use update command with verbose mode
composer -vvv update
It will display every single output and you will not be impatient.

ssh error - Agent admitted failure to sign using the key

Solution : 1

ssh login using command

SSH_AUTH_SOCK=0 ssh server-ip

Example : SSH_AUTH_SOCK=0 ssh username@192.168.0.xx

Solution : 2

Run Command

ssh-add

Ubuntu Boot Error - Fixing Recursive Fault Issue

Solution :

sudo nano /etc/default/grub

Change the line

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash” 
to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off"

And then update grub

sudo update-grub