SSH

start to find id_rsawhich this file use to authenticate user without password

find / -name id_rsa 2>/dev/null

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then display this privilege of this file

ls -las 
4 -rwxrwxrwx 1 root root 2590 Jun 17  2020 id_rsa

to use id_rsafile u must change this privilege with the correct privilege 400 or 600

in this lab i couldn’t change this privilege direct so i take this key and add it in a new file and start to edit this file

ssh -i id_rsa root@10.10.195.72