login as: ec2-user
Authenticating with public key "imported-openssh-key"
Last login: Wed Sep 13 07:55:10 2017 from ec2-52-80-79-217.cn-north-1.compute.amazonaws.com.cn
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$ cd /
[ec2-user@ip-10-0-0-102 /]$ sudo su
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# useradd xiao
[root@ip-10-0-0-102 /]# cd /home xiao
[root@ip-10-0-0-102 home]# sudo do / xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do xiao/
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do sudo /xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do su - xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo su - xiao
[xiao@ip-10-0-0-102 ~]$ ssh
usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
[-D [bind_address:]port] [-e escape_char] [-F configfile]
[-I pkcs11] [-i identity_file]
[-L [bind_address:]port:host:hostport]
[-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
[-R [bind_address:]port:host:hostport] [-S ctl_path]
[-W host:port] [-w local_tun[:remote_tun]]
[user@]hostname [command]
[xiao@ip-10-0-0-102 ~]$ ssh -key gen
ssh: Could not resolve hostname gen: Name or service not known
[xiao@ip-10-0-0-102 ~]$ ssh-key gen
-bash: ssh-key: command not found
[xiao@ip-10-0-0-102 ~]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/xiao/.ssh/id_rsa):
Created directory '/home/xiao/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/xiao/.ssh/id_rsa.
Your public key has been saved in /home/xiao/.ssh/id_rsa.pub.
The key fingerprint is:
61:88:92:ea:67:88:b1:b2:6e:cc:5b:61:14:0f:ad:af [email protected]
The key's randomart image is:
+--[ RSA 2048]----+
| o. |
| .+o . |
| o.o.. o |
| ..o . . |
|o o. S |
|ooo .. |
|*o +. |
|.=+E |
|+o. |
+-----------------+
[xiao@ip-10-0-0-102 ~]$
[xiao@ip-10-0-0-102 ~]$ cd .ssh
[xiao@ip-10-0-0-102 .ssh]$ ls
id_rsa id_rsa.pub
[xiao@ip-10-0-0-102 .ssh]$ pwd
/home/xiao/.ssh
[xiao@ip-10-0-0-102 .ssh]$ sud0 su
-bash: sud0: command not found
[xiao@ip-10-0-0-102 .ssh]$ sudo do su
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for xiao:
Sorry, try again.
[sudo] password for xiao:
Sorry, try again.
[sudo] password for xiao:
Sorry, try again.
sudo: 3 incorrect password attempts
[xiao@ip-10-0-0-102 .ssh]$
[xiao@ip-10-0-0-102 .ssh]$ exit
logout
[root@ip-10-0-0-102 home]# cd xiao
[root@ip-10-0-0-102 xiao]# cd .ssh
[root@ip-10-0-0-102 .ssh]# ls
id_rsa id_rsa.pub
[root@ip-10-0-0-102 .ssh]# copy id_rsa /home/ec2-user
bash: copy: command not found
[root@ip-10-0-0-102 .ssh]# cy id_rsa /home/ec2-user
bash: cy: command not found
[root@ip-10-0-0-102 .ssh]# cp id_rsa /home/ec2-user
[root@ip-10-0-0-102 .ssh]# cd home
bash: cd: home: No such file or directory
[root@ip-10-0-0-102 .ssh]# ^C
[root@ip-10-0-0-102 .ssh]# cd /
[root@ip-10-0-0-102 /]# cd homw
bash: cd: homw: No such file or directory
[root@ip-10-0-0-102 /]# cd home
[root@ip-10-0-0-102 home]# ls -lrt
total 8
drwx------. 5 xiao xiao 4096 Sep 13 09:15 xiao
drwx------. 3 ec2-user ec2-user 4096 Sep 13 09:19 ec2-user
[root@ip-10-0-0-102 home]# cd ec2-user
[root@ip-10-0-0-102 ec2-user]# ls -lrt
total 8
-rw-rw-r--. 1 ec2-user ec2-user 18 Sep 9 03:54 test.txt
-rw-------. 1 root root 1675 Sep 13 09:19 id_rsa
[root@ip-10-0-0-102 ec2-user]# ls
id_rsa test.txt
[root@ip-10-0-0-102 ec2-user]# chmod +r id_rsa
[root@ip-10-0-0-102 ec2-user]# sudo su - xiao
[xiao@ip-10-0-0-102 ~]$ cd .ssh
[xiao@ip-10-0-0-102 .ssh]$ cat id_rsa.pub >> authorized_keys
[xiao@ip-10-0-0-102 .ssh]$ chmod 600 authorized_keys
[xiao@ip-10-0-0-102 .ssh]$ exit
logout
[root@ip-10-0-0-102 ec2-user]# cd /etc/ssh/sshd_config
bash: cd: /etc/ssh/sshd_config: Not a directory
[root@ip-10-0-0-102 ec2-user]# cd /
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# cd /etc/ssh/sshd_config
bash: cd: /etc/ssh/sshd_config: Not a directory
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config
# $OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require explicit
# activation of protocol 1
Protocol 2
# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 1024
# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
SyslogFacility AUTHPRIV
#LogLevel INFO
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10
#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
#AuthorizedKeysCommand none
#AuthorizedKeysCommandRunAs nobody
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
PasswordAuthentication no
# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
ChallengeResponseAuthentication no
# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
#KerberosUseKuserok yes
# GSSAPI options
#GSSAPIAuthentication no
GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
GSSAPICleanupCredentials yes
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
#UsePAM no
UsePAM yes
# Accept locale-related environment variables
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS
#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#ShowPatchLevel no
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
# no default banner path
#Banner none
# override default of no subsystems
Subsystem sftp /usr/libexec/openssh/sftp-server
# Example of overriding settings on a per-user basis
#Match User anoncvs
# X11Forwarding no
# AllowTcpForwarding no
# ForceCommand cvs server[root@ip-10-0-0-102 /]# ^C
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config | grpt grep -i RSAAuthentication
bash: grpt: command not found
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config | grep -i RSAAuthentication
#RSAAuthentication yes
#RhostsRSAAuthentication no
# RhostsRSAAuthentication and HostbasedAuthentication
[root@ip-10-0-0-102 /]# su
[root@ip-10-0-0-102 /]#login as: ec2-user
Authenticating with public key "imported-openssh-key"
Last login: Wed Sep 13 07:55:10 2017 from ec2-52-80-79-217.cn-north-1.compute.amazonaws.com.cn
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$ cd /
[ec2-user@ip-10-0-0-102 /]$ sudo su
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# useradd xiao
[root@ip-10-0-0-102 /]# cd /home xiao
[root@ip-10-0-0-102 home]# sudo do / xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do xiao/
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do sudo /xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do su - xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo su - xiao
[xiao@ip-10-0-0-102 ~]$ ssh
usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
[-D [bind_address:]port] [-e escape_char] [-F configfile]
[-I pkcs11] [-i identity_file]
[-L [bind_address:]port:host:hostport]
[-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
[-R [bind_address:]port:host:hostport] [-S ctl_path]
[-W host:port] [-w local_tun[:remote_tun]]
[user@]hostname [command]
[xiao@ip-10-0-0-102 ~]$ ssh -key gen
ssh: Could not resolve hostname gen: Name or service not known
[xiao@ip-10-0-0-102 ~]$ ssh-key gen
-bash: ssh-key: command not found
[xiao@ip-10-0-0-102 ~]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/xiao/.ssh/id_rsa):
Created directory '/home/xiao/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/xiao/.ssh/id_rsa.
Your public key has been saved in /home/xiao/.ssh/id_rsa.pub.
The key fingerprint is:
61:88:92:ea:67:88:b1:b2:6e:cc:5b:61:14:0f:ad:af [email protected]
The key's randomart image is:
+--[ RSA 2048]----+
| o. |
| .+o . |
| o.o.. o |
| ..o . . |
|o o. S |
|ooo .. |
|*o +. |
|.=+E |
|+o. |
+-----------------+
[xiao@ip-10-0-0-102 ~]$
[xiao@ip-10-0-0-102 ~]$ cd .ssh
[xiao@ip-10-0-0-102 .ssh]$ ls
id_rsa id_rsa.pub
[xiao@ip-10-0-0-102 .ssh]$ pwd
/home/xiao/.ssh
[xiao@ip-10-0-0-102 .ssh]$ sud0 su
-bash: sud0: command not found
[xiao@ip-10-0-0-102 .ssh]$ sudo do su
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for xiao:
Sorry, try again.
[sudo] password for xiao:
Sorry, try again.
[sudo] password for xiao:
Sorry, try again.
sudo: 3 incorrect password attempts
[xiao@ip-10-0-0-102 .ssh]$
[xiao@ip-10-0-0-102 .ssh]$ exit
logout
[root@ip-10-0-0-102 home]# cd xiao
[root@ip-10-0-0-102 xiao]# cd .ssh
[root@ip-10-0-0-102 .ssh]# ls
id_rsa id_rsa.pub
[root@ip-10-0-0-102 .ssh]# copy id_rsa /home/ec2-user
bash: copy: command not found
[root@ip-10-0-0-102 .ssh]# cy id_rsa /home/ec2-user
bash: cy: command not found
[root@ip-10-0-0-102 .ssh]# cp id_rsa /home/ec2-user
[root@ip-10-0-0-102 .ssh]# cd home
bash: cd: home: No such file or directory
[root@ip-10-0-0-102 .ssh]# ^C
[root@ip-10-0-0-102 .ssh]# cd /
[root@ip-10-0-0-102 /]# cd homw
bash: cd: homw: No such file or directory
[root@ip-10-0-0-102 /]# cd home
[root@ip-10-0-0-102 home]# ls -lrt
total 8
drwx------. 5 xiao xiao 4096 Sep 13 09:15 xiao
drwx------. 3 ec2-user ec2-user 4096 Sep 13 09:19 ec2-user
[root@ip-10-0-0-102 home]# cd ec2-user
[root@ip-10-0-0-102 ec2-user]# ls -lrt
total 8
-rw-rw-r--. 1 ec2-user ec2-user 18 Sep 9 03:54 test.txt
-rw-------. 1 root root 1675 Sep 13 09:19 id_rsa
[root@ip-10-0-0-102 ec2-user]# ls
id_rsa test.txt
[root@ip-10-0-0-102 ec2-user]# chmod +r id_rsa
[root@ip-10-0-0-102 ec2-user]# sudo su - xiao
[xiao@ip-10-0-0-102 ~]$ cd .ssh
[xiao@ip-10-0-0-102 .ssh]$ cat id_rsa.pub >> authorized_keys
[xiao@ip-10-0-0-102 .ssh]$ chmod 600 authorized_keys
[xiao@ip-10-0-0-102 .ssh]$ exit
logout
[root@ip-10-0-0-102 ec2-user]# cd /etc/ssh/sshd_config
bash: cd: /etc/ssh/sshd_config: Not a directory
[root@ip-10-0-0-102 ec2-user]# cd /
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# cd /etc/ssh/sshd_config
bash: cd: /etc/ssh/sshd_config: Not a directory
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config
# $OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require explicit
# activation of protocol 1
Protocol 2
# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 1024
# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
SyslogFacility AUTHPRIV
#LogLevel INFO
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10
#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
#AuthorizedKeysCommand none
#AuthorizedKeysCommandRunAs nobody
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
PasswordAuthentication no
# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
ChallengeResponseAuthentication no
# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
#KerberosUseKuserok yes
# GSSAPI options
#GSSAPIAuthentication no
GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
GSSAPICleanupCredentials yes
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
#UsePAM no
UsePAM yes
# Accept locale-related environment variables
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS
#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#ShowPatchLevel no
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
# no default banner path
#Banner none
# override default of no subsystems
Subsystem sftp /usr/libexec/openssh/sftp-server
# Example of overriding settings on a per-user basis
#Match User anoncvs
# X11Forwarding no
# AllowTcpForwarding no
# ForceCommand cvs server[root@ip-10-0-0-102 /]# ^C
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config | grpt grep -i RSAAuthentication
bash: grpt: command not found
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config | grep -i RSAAuthentication
#RSAAuthentication yes
#RhostsRSAAuthentication no
# RhostsRSAAuthentication and HostbasedAuthentication
[root@ip-10-0-0-102 /]# su
[root@ip-10-0-0-102 /]#login as: ec2-user
Authenticating with public key "imported-openssh-key"
Last login: Wed Sep 13 07:55:10 2017 from ec2-52-80-79-217.cn-north-1.compute.amazonaws.com.cn
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$
[ec2-user@ip-10-0-0-102 ~]$ cd /
[ec2-user@ip-10-0-0-102 /]$ sudo su
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# useradd xiao
[root@ip-10-0-0-102 /]# cd /home xiao
[root@ip-10-0-0-102 home]# sudo do / xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do xiao/
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do sudo /xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo do su - xiao
sudo: do: command not found
[root@ip-10-0-0-102 home]# sudo su - xiao
[xiao@ip-10-0-0-102 ~]$ ssh
usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
[-D [bind_address:]port] [-e escape_char] [-F configfile]
[-I pkcs11] [-i identity_file]
[-L [bind_address:]port:host:hostport]
[-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
[-R [bind_address:]port:host:hostport] [-S ctl_path]
[-W host:port] [-w local_tun[:remote_tun]]
[user@]hostname [command]
[xiao@ip-10-0-0-102 ~]$ ssh -key gen
ssh: Could not resolve hostname gen: Name or service not known
[xiao@ip-10-0-0-102 ~]$ ssh-key gen
-bash: ssh-key: command not found
[xiao@ip-10-0-0-102 ~]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/xiao/.ssh/id_rsa):
Created directory '/home/xiao/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/xiao/.ssh/id_rsa.
Your public key has been saved in /home/xiao/.ssh/id_rsa.pub.
The key fingerprint is:
61:88:92:ea:67:88:b1:b2:6e:cc:5b:61:14:0f:ad:af [email protected]
The key's randomart image is:
+--[ RSA 2048]----+
| o. |
| .+o . |
| o.o.. o |
| ..o . . |
|o o. S |
|ooo .. |
|*o +. |
|.=+E |
|+o. |
+-----------------+
[xiao@ip-10-0-0-102 ~]$
[xiao@ip-10-0-0-102 ~]$ cd .ssh
[xiao@ip-10-0-0-102 .ssh]$ ls
id_rsa id_rsa.pub
[xiao@ip-10-0-0-102 .ssh]$ pwd
/home/xiao/.ssh
[xiao@ip-10-0-0-102 .ssh]$ sud0 su
-bash: sud0: command not found
[xiao@ip-10-0-0-102 .ssh]$ sudo do su
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for xiao:
Sorry, try again.
[sudo] password for xiao:
Sorry, try again.
[sudo] password for xiao:
Sorry, try again.
sudo: 3 incorrect password attempts
[xiao@ip-10-0-0-102 .ssh]$
[xiao@ip-10-0-0-102 .ssh]$ exit
logout
[root@ip-10-0-0-102 home]# cd xiao
[root@ip-10-0-0-102 xiao]# cd .ssh
[root@ip-10-0-0-102 .ssh]# ls
id_rsa id_rsa.pub
[root@ip-10-0-0-102 .ssh]# copy id_rsa /home/ec2-user
bash: copy: command not found
[root@ip-10-0-0-102 .ssh]# cy id_rsa /home/ec2-user
bash: cy: command not found
[root@ip-10-0-0-102 .ssh]# cp id_rsa /home/ec2-user
[root@ip-10-0-0-102 .ssh]# cd home
bash: cd: home: No such file or directory
[root@ip-10-0-0-102 .ssh]# ^C
[root@ip-10-0-0-102 .ssh]# cd /
[root@ip-10-0-0-102 /]# cd homw
bash: cd: homw: No such file or directory
[root@ip-10-0-0-102 /]# cd home
[root@ip-10-0-0-102 home]# ls -lrt
total 8
drwx------. 5 xiao xiao 4096 Sep 13 09:15 xiao
drwx------. 3 ec2-user ec2-user 4096 Sep 13 09:19 ec2-user
[root@ip-10-0-0-102 home]# cd ec2-user
[root@ip-10-0-0-102 ec2-user]# ls -lrt
total 8
-rw-rw-r--. 1 ec2-user ec2-user 18 Sep 9 03:54 test.txt
-rw-------. 1 root root 1675 Sep 13 09:19 id_rsa
[root@ip-10-0-0-102 ec2-user]# ls
id_rsa test.txt
[root@ip-10-0-0-102 ec2-user]# chmod +r id_rsa
[root@ip-10-0-0-102 ec2-user]# sudo su - xiao
[xiao@ip-10-0-0-102 ~]$ cd .ssh
[xiao@ip-10-0-0-102 .ssh]$ cat id_rsa.pub >> authorized_keys
[xiao@ip-10-0-0-102 .ssh]$ chmod 600 authorized_keys
[xiao@ip-10-0-0-102 .ssh]$ exit
logout
[root@ip-10-0-0-102 ec2-user]# cd /etc/ssh/sshd_config
bash: cd: /etc/ssh/sshd_config: Not a directory
[root@ip-10-0-0-102 ec2-user]# cd /
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# cd /etc/ssh/sshd_config
bash: cd: /etc/ssh/sshd_config: Not a directory
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config
# $OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require explicit
# activation of protocol 1
Protocol 2
# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 1024
# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
SyslogFacility AUTHPRIV
#LogLevel INFO
# Authentication:
#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10
#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
#AuthorizedKeysCommand none
#AuthorizedKeysCommandRunAs nobody
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes
# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
PasswordAuthentication no
# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
ChallengeResponseAuthentication no
# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
#KerberosUseKuserok yes
# GSSAPI options
#GSSAPIAuthentication no
GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
GSSAPICleanupCredentials yes
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
#UsePAM no
UsePAM yes
# Accept locale-related environment variables
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS
#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#ShowPatchLevel no
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
# no default banner path
#Banner none
# override default of no subsystems
Subsystem sftp /usr/libexec/openssh/sftp-server
# Example of overriding settings on a per-user basis
#Match User anoncvs
# X11Forwarding no
# AllowTcpForwarding no
# ForceCommand cvs server[root@ip-10-0-0-102 /]# ^C
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]#
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config | grpt grep -i RSAAuthentication
bash: grpt: command not found
[root@ip-10-0-0-102 /]# cat /etc/ssh/sshd_config | grep -i RSAAuthentication
#RSAAuthentication yes
#RhostsRSAAuthentication no
# RhostsRSAAuthentication and HostbasedAuthentication
[root@ip-10-0-0-102 /]# su
[root@ip-10-0-0-102 /]#