lorne-luo

sudo useradd -m lorneluo --shell /bin/bash
sudo mkdir -p /home/lorneluo/.ssh

sudo touch /home/lorneluo/.ssh/authorized_keys
sudo vi /home/lorneluo/.ssh/authorized_keys
# past ssh key into /home/lorneluo/.ssh/authorized_keys
sudo echo '' >> /home/lorneluo/.ssh/authorized_keys

sudo chmod 644 /home/lorneluo/.ssh
sudo chmod 600 /home/lorneluo/.ssh/authorized_keys

lorne-luo

# To delete downloaded packages
sudo apt-get clean

# To remove all stored archives in your cache for packages
sudo apt-get autoclean

# To remove unnecessary packages
sudo apt-get autoremove

# check kernel version can remove

lorne-luo

$JAVA_HOME/bin/keytool -importkeystore -srckeystore /<our_ca_certs>.jks -srcstorepass <pass> -destkeystore $JAVA_HOME/lib/security/cacerts -deststorepass changeit

$JAVA_HOME/lib/security/cacerts

openssl s_client -connect bpaustralia.lei.com:443 -CApath /etc/ssl/certs


sudo cp /etc/nginx/certs/lob2023cer.crt /usr/local/share/ca-certificates
sudo update-ca-certificates --fresh

lorne-luo

# install dependencies needed to build new openssh
sudo apt-get build-dep openssh openssh-server

# downloaad openssh-server v9.3
wget -c https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-9.3p2.tar.gz
tar -xzf openssh-9.3p2.tar.gz
cd openssh-9.3p2/

# compile
./configure --with-md5-passwords --with-pam --with-selinux