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devarampati edited this page Apr 10, 2019 · 5 revisions

Two level SSH tunneling

Host1: ssh -N -f -L localhost:8883:localhost:8881 root@
Host2: ssh -N -f -L localhost:8881:localhost:8888 root@

Change ssh port

Add port number in /etc/ssh/sshd_config
restart service sshd restart

Format HD

sudo parted /dev/sd mklabel gpt
sudo parted -a opt /dev/sd mkpart primary ext4 0% 100%
sudo mkfs.ext4 -L /dev/sd
sudo mkdir -p /mnt/
sudo mount -o defaults /dev/sd /mnt/
echo "LABEL= /mnt/ ext4 defaults 0 2" >> sudo /etc/fstab
reboot

C++11

sizeof string - 32
sizeof Vector - 24
no change in sizeof due to addition of class or friend class
sizeof parent gets added to the child for inheritance

PBS commands

lshosts
bhosts
bsub
lsid
bjobs
bqueues
bsub
bkill
bpeek