OpenSSH Upgrade 8.6p1 latest version

Go to Openssh firsthttps://openbsd.hk/pub/OpenBSD/OpenSSH/portable/

Uploaded to the server to decompress TAR XFZ openssh-8.6p1.tar.gz file

Possible file default displayuidwithgidArrays are1000, Re-authorized here. Do not authorize may not affect the installation (please test your own)

Chown -r root.root /root/openssh-8.6p1 possible file default displayuidwithgidArrays are1000, Re-authorized here. Do not authorize may not affect the installation (please test your own)

Back up the data before upgrading

Backup SSH:

mv /etc/ssh /etc/sshbak

mv /usr/bin/ssh /usr/bin/sshbak

mv /usr/sbin/sshd /usr/sbin/sshdbak

Delete the previous SSH

rm -rf /etc/ssh/*

Switch toOpenSSH-8.6P below

./configure --prefix=/usr/ --sysconfdir=/etc/ssh --with-openssl-includes=/usr/local/openssl/include --with-ssl-dir=/usr/local/openssl --with-zlib --with-md5-passwords --with-pam && make && make install

The following information is displayed:

Installed Check the result 0 is success.

The modification of the configuration file is finally as follows, other don't movevim /etc/ssh/sshd_config

（1.modify#PermitRootLogin prohibit-passwordItem, remove the comment#Put togetherprohibit-passwordChange toyesAfter the revisionPermitRootLogin yes

(2.Remove the comment#PasswordAuthentication yesBecomePasswordAuthentication yes

(3.Remove the comment#UseDNS noBecomeUseDNS no

Verify configuration

grep "^PermitRootLogin" /etc/ssh/sshd_config

grep "UseDNS" /etc/ssh/sshd_config

Copy some files from the original unzipped package (if there is a target directory)

cp -a contrib/redhat/sshd.init /etc/init.d/sshd
cp -a contrib/redhat/sshd.pam /etc/pam.d/sshd.pam
chmod +x /etc/init.d/sshd

Add Add Inspiration ServicessshTo the boot startup item

chkconfig --add sshd
Systemctl Enable SSHD This newspaper is not used below

OriginalsystemdManagesshdFile delete or remove or delete, if you don't move, affect us restartsshdservice

SetsshdService boot start

chkconfig sshd on

View the installation results:

Next, test the start and stop service. Normal

Later managessshdBy way of the following

/etc/init.d/sshd restart
netstat -lntp
/etc/init.d/sshd stop
netstat -lntp
/etc/init.d/sshd start
netstat -lntp

If the upgrade failed rollback:

Restore backup SSH:

mv /etc/sshbak /etc/ssh

mv /usr/bin/sshbak /usr/bin/ssh

mv /usr/sbin/sshdbak /usr/sbin/sshd

Restart SSHD service:

service sshd restart

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