ILUG-D March 2023

ilugd@lists.linuxdelhi.org

1 participants
29 discussions

1D1C - sshd
by Dhanasekar 04 Mar '23

04 Mar '23

sshd - is the daemon program for ssh To use either IPv4 or IPv6 only # /usr/sbin/sshd -4 # /usr/sbin/sshd -6 To display debug modes # /usr/sbin/sshd -D # /usr/sbin/sshd -d -d -d To send the error messages to the standard error # /usr/sbin/sshd -d -e To use own config file for sshd apart default /etc/ssh/sshd_config # /usr/sbin/sshd -f /root/conf/custom_sshd.conf To customize SSHD grace time # /usr/sbin/sshd -g 180 To specify options in command line # /usr/sbin/sshd -o "AllowUsers user3 user4" regards, T.Dhanasekar

1 0

1D1C - ssh-copy-id
by Dhanasekar 03 Mar '23

03 Mar '23

ssh-copy-id - use locally available keys to authorise logins on a remote machine create ssh key $ ssh-keygen -t rsa To copy ssh key to remote machine $ ssh-copy-id -i /home/ilugc/.ssh/id_rsa.pub user(a)192.168.122.101 To enable forced mode to copy ssh key to remote machine $ ssh-copy-id -f -i /home/dhana/.ssh/id_rsa.pub dhana(a)192.168.122.101 To perform dry-run that prints the keys intended for installation without installing them on the remote host $ ssh-copy-id -n -i /home/dhana/.ssh/id_rsa.pub dhana(a)192.168.122.101 To connect to a remote host when the default SSH port is not being used. $ ssh-copy-id -i -p <custom_port> /home/dhana/.ssh/id_rsa.pub dhana(a)192.168.122.101 regards, T.Dhanasekar

1 0

1D1C - ssh-agent
by Dhanasekar 02 Mar '23

02 Mar '23

ssh-agent - is a program to hold private keys used for public key authentication To start the ssh-agent $ ssh-agent To stop / kill the ssh-agent $ ssh-agent -k To run ssh-agent in debug mode $ ssh-agent -d To set bind socket name $ ssh-agent -a ~/demo-ssh-socket $SHELL To set expiry time for keys $ ssh-agent -t 1800 $SHELL $ ssh-agent -t 10D $SHELL regards, T.Dhanasekar

1 0

1D1C - ssh-add
by Dhanasekar 01 Mar '23

01 Mar '23

ssh-add - adds private key identities to the OpenSSH authentication agent To create the public key and the private key $ ssh-keygen -t rsa To keep the identity of the agents for 600 seconds. $ ssh-agent -t 600 To make ssh-agent command for non-interactive authentication $ eval $(ssh-agent) To add the private key passphrase to ssh-agent $ ssh-add To list my private keys cached by ssh-agent $ ssh-add -l To list all public key parameters of all identities $ ssh-add -L To remove all cached ssh-agent private keys $ ssh-add -D To lock the SSH Agent $ ssh-add -x To unlock SSH Agent $ ssh-add -X regards, T.Dhanasekar

1 0

2024

2023

2022

2021

ILUG-D March 2023