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ssh commands

MarkSkAxel answered on April 17, 2023 Popularity 10/10 Helpfulness 3/10

answer ssh commands

ssh commands

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ssh username@ip_address port // to connect to the server
//folder path for ssh is .ssh 
ssh-keygen // to generate public and private key pair default key type is RSA
ssh-keygen -t key_type -C "comment" // to have different key type and -c will add comment
// default comment is nothgin but user name and system name
ssh-copy-id -i ~/.ssh/public_file_name username@ip_address_of_server // to copy public key to server
// .ssh/authorised_keys is the place to add the public key to give it the access to the server
//it is highly possible to have different public and private key pairs
//so while making connection to server how to use specific key to connect
//instead of the brutforce we can specify privatekey to be used for that server_connection as below
ssh -i ~/.ssh/private_key_name username@ip_address 
//sshd is the service that actually accepts the connections
//sshd is the "daemon"
//it is most likely to be present on the server 
//to check use "which sshd" if it present or not
//to check the status of sshd on the server use below command
systemctl status sshd // to check the status of it
//if it is active then only we can connect to the server
// we can restart the service by below command
systemctl restart sshd
// we can stop the sshd by using the below command
systemctl stop sshd // so once stopped it no longer accepts new connection
// and the connection which are already made have no impact on them as long as they 
//they are logger in but once logged out they will also not able to connect
//in short existing connection will not be terminated
systemctl start sshd // this will be used to start the sshd

/etc/ssh // this is the folder where the ssh and sshd config files is present
//there you will be able to find two files with names as below
"ssh_config", "sshd_config"
"ssh_config": //this file is used by the ssh client this is used to if you want ssh to 
//connect to another host it has config as port number, encrypt/MAC algorithm
"sshd_config"://this file is used for sshd daemon(the program that listens to the
// connection requests to the ssh port) for example if someone wants to connect 
// to your host machine, then their SSH client settings must match your sshd_config
//setting in order to communicate with you, such as port no., version etc.

Popularity 10/10 Helpfulness 3/10 Language shell

Source: Grepper

Tags: shell ssh

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Contributed on Apr 17 2023

MarkSkAxel

0 Answers Avg Quality 2/10

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