jkullick

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jkullick / ssh-generate-key.md

Last active July 29, 2016 12:10

Generate SSH Key

ssh-keygen -t rsa -b 4096 -N '' -f ~/.ssh/id_rsa -C '$COMMENT'

jkullick / chroot-sftp-only-user.md

Last active July 29, 2016 12:10

Add Chroot SFTP-only User (no shell access)

usermod -G sftp $USER
usermod -s /bin/false $USER
chown root:root /home/$USER
chmod 0755 /home/$USER
mkdir /home/$USER/uploads
chown $USER:$USER /home/$USER/uploads

/etc/ssh/sshd_config:

jkullick / ssh-key-fingerprint.md

Last active August 17, 2016 08:25

Get Fingerprint from SSH Public Key

ssh-keygen [-E md5] -lf ~/.ssh/id_rsa.pub

jkullick / ssh-extract-public-key.md

Last active July 29, 2016 12:09

Extract Public Key from SSH Private Key

ssh-keygen -y -f ~/.ssh/id_rsa > ~/.ssh/id_rsa.pub

jkullick / docker-remove-all-images-containers.md

Last active July 29, 2016 12:06

Remove all Docker Images and Containers

# Containers
docker rm -f $(docker ps -a -q)

# Images
docker rmi -f $(docker images -q)

jkullick / docker-remove-all-untagged-images.md

Last active March 23, 2017 08:33

Remove all untagged Docker Images

docker rmi -f $(docker images | grep "^<none>" | awk '{print $3}')

Source

jkullick / docker-ufw-allow.md

Last active June 27, 2018 04:29

Allow Docker in UFW

/etc/default/ufw:

...
DEFAULT_FORWARD_POLICY="ACCEPT"

service ufw restart
ufw allow in on docker0
ufw allow out on docker0

jkullick / ssl-generate-key-pair.md

Last active August 4, 2016 12:32

Generate OpenSSL Key Pair

openssl req -out $DOMAIN.csr -newkey rsa:4096 -nodes -sha256 -keyout $DOMAIN.key -subj "/CN=$DOMAIN"

jkullick / ssl-self-sign-certificate.md

Last active July 29, 2016 12:06

Self-Sign SSL Certificate

openssl x509 -req -days 3650 -in $DOMAIN.csr -signkey $DOMAIN.key -out $DOMAIN.crt

jkullick / ssl-test-connection.md

Last active July 29, 2016 12:05

Test SSL Connection

openssl s_client -connect $SERVER:443

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