Experiment with SSH\/SSHD\/OpenSSH in CentOS\/Redhat Linux<\/p>\n
Yes, from\u00a0 my history (Probably a review for the technical people, who already knew these sometimes in the past)<\/p>\n
461 echo “dec 24th, 2017”
\n462 vim \/etc\/ssh\/sshd_config<\/p>\n
463 echo “SSH Related Commands”
\n464 scp -> secure copy
\n465 tscp -> secure copy for windows
\n466 sftp -> secure ftp
\n467 slogin -> secure login – alternative to rlogin
\n468 ssh -> provides secure telnet, secure rlogin
\n469 ssh-add -> provides DSA\/ECDSA\/RSA characteristics to ssh-agent
\n470 ssh-agent<\/p>\n
<\/p>\n
471 ssh-agent output
\n472 SSH_AUTH_SOCK=\/tmp\/ssh-DQP6FzPIZvG7\/agent.3903; export SSH_AUTH_SOCK;
\n473 SSH_AGENT_PID=3904; export SSH_AGENT_PID;
\n474 echo Agent pid 3904;<\/p>\n
475 ssh-copy-id -> copy keys to remote system (manual copy is also an option, you can use scp as well)
\n476 ssh-keygen: generates public and private key<\/p>\n
<\/p>\n
477 SSH components: the server with the SSH daemon. The client with scp, sftp, slogin, ssh, ssh-copy-id. and the openssh packgae itself to provide ssh-ketgen and different modules and libraries.
\n478 ssh-agent : authentication agent that also holds private keys
\n479 cat \/etc\/ssh\/sshd_config > system wide ssh config file
\n480 cat \/etc\/ssh\/sshd_config<\/p>\n
481 cat \/etc\/ssh\/ssh_config
\n482 vim \/etc\/ssh\/ssh_config
\n483 vim \/etc\/ssh\/sshd_config
\n484 cat \/etc\/sysconfig\/sshd<\/p>\n
485 cat \/etc\/sysconfig\/sshd -> server configuration file
\n486 cat \/var\/log\/secure
\n487 cat \/var\/log\/secure -> related messages<\/p>\n
488 cat \/etc\/passwd
\n489 useradd user1
\n490 passwd user1
\n491 su user1
\n492 useradd user100
\n493 passwd user100
\n494 su user100<\/p>\n
496 ipaddr
\n497 ip addr
\n498 nmtui
\n499 ip addr
\n500 su user1<\/p>\n
501 exit
\n502 history > ssh_history.txt
\n503 history<\/p>\n
<\/p>\n
<\/p>\n
after switching to user100<\/p>\n
<\/p>\n
ssh 192.168.12.45
\n4 ssh 192.168.12.45 \/bin\/ls -la<\/p>\n
exit<\/p>\n
cd ~<\/p>\n
14 touch file1
\n15 scp file1 192.168.12.45:\/home\/user100
\n16 sftp 192.168.12.45<\/p>\n","protected":false},"excerpt":{"rendered":"
Experiment with SSH\/SSHD\/OpenSSH in CentOS\/Redhat Linux Yes, from\u00a0 my history (Probably a review for the technical people, who already knew these sometimes in the past) 461 echo “dec 24th, 2017” 462 vim \/etc\/ssh\/sshd_config 463 echo “SSH Related Commands” 464 scp -> secure copy 465 tscp -> secure copy for windows 466 sftp -> secure ftp … <\/p>\n