Category: Web

Some semi-random commands for Docker.

Image commands:

docker --help #to list all commands
sudo docker images -a -q #return just the ID of all images
sudo docker rmi <image name> #to remove a specific image

Working with containers:

sudo docker ps -a -q #return just the ID of all containers
sudo docker rm <container name or ID> #to remove specific container

The one’s that I needed while working with Azure:

docker login m1dev.azurecr.io --username 00000000-0000-0000-0000-000000000000 --password $TOKEN

az acr login --name m1devcr

*** if this fails, try to clear account on server

Az account clear

–goto directy with docker file and run?

sudo docker build -t <acr service name>/<acr repo>/<image name>:<image tag> <Path to dockerfile>
#i.e. - sudo docker build -t m1dev.azurecr.io/path/portal:version.R21.0.10 portal

–tag is version number, might be in helm chart

docker push <acr service name>/<acr repo>/<image name>:<image tag>

Found this fix for build failure with copying too many files in a row – https://stackoverflow.com/questions/51115856/docker-failed-to-export-image-failed-to-create-image-failed-to-get-layer

DOCKER_BUILDKIT=1 docker build --tag app:test 

–used build.sh provided and then these:

docker tag /data/portal:latest m1dev.azurecr.io/path/portal:version.R21.0.10
docker push m1dev.azurecr.io/path/portal:version.R21.0.10

https://docs.docker.com/engine/reference/commandline

docker system prune  --all

Pull from another repo-

#put your password in a file and then run the login command, reading the file

nano ~/my_password.txt
cat ~/my_password.txt | sudo docker login -u TIdev1 --password-stdin TIdev1.azurecr.io

#the list of images to pull from another repo-

sudo docker pull TIdev1.azurecr.io/path/analytics/api -a
sudo docker pull TIdev1.azurecr.io/path/analytics/bootstrap -a
sudo docker pull TIdev1.azurecr.io/path/analytics/web -a
sudo docker pull TIdev1.azurecr.io/path/data/mysql-client -a

As I get into Linux a little more and learn some handy commands, I’m going to document them here.

ssh user@server -m [algorithm] Sometimes when reaching from Windows into Linux you need to force agreement on the security algorithm both sides are using

ssh -Q mac to query what security algorithm are available

nano –linenumbers [file name] text editor

df -h to get list of folders and space in Linux

fdisk -l to get disk info

du -ah to get disk usage for all files and directory

du -sh for current directory

chmod 755 [file_name] grant most everything rights

Ln -s [file or dir name] make symbolic link

unlink [file or dir name] remove symbolic link

rm -d to remove directory

rm -dr to remove not empty directory

history | grep [search term] -A 10 -B 10 ### search history and show the 10 lines before and after

ls -a or -ll to list all files and folders with more details, or hidden ones

ip -c a to get a list of network interfaces in color!

sudo ip addr add [server IP]/24 dev [interface name] set the interface to use given IP, needs the following to turn on

ip link set dev [interface name] up or down, to turn on or off a network interface

ip route add default via [gateway IP] dev [interface name] sets default route to gateway

sudo nano /etc/systemd/resolved.conf, scroll down and un-comment or amend “DNS=” line to add the DNS servers you need. Will have to restart service with sudo systemctl restart systemd-resolved

sudo nano .bashrc (from home directory), scroll down to line 46 or so and un-comment the force_color_prompt line to get colored terminal output. You will have to logout/login to get the change.