#### newsetup ####
About ====
This program is a simple script designed to handle a couple of trivial tasks. The script helps setting up hostname and ssh keys quickly, a common use case when building a cluster of node servers. Once the ssh keys and proper hostnames are there, each node can be accessed individually or in a group setting. To orchestrate any repetitive tasks after that could be done much quicker, for example, using ansible or similar tools.
Backstory ====
While working on setting up a raspi cluster, I realized that I needed to generate ssh keys from each node by logging into each manually. For easy access within a local network, I also needed to set up the hostname for each. Since this is a pretty trivial but tedious task to repeat in the future, I created this script.
System requirement ====
- bash - tested with 3.2, 4.4 and 5.
- gnu-getopt - the getopt found on macOS will not work, you must install the gnu-getopt.
brew install gnu-getopt, and make sure the gnu-getopt is in your path ahead of the existing BSD getopt.
Quick usage: ====
Log into a node and setup a hostname and generate a 521 bits ecdsa ssh key.
Run the script dynamically using:
curl
# Test with dry-run bash <(curl -sL tiny.cc/new-setup) -n machine01 -k ecdsa --bits 521 --dry-run # Run the code bash <(curl -sL tiny.cc/new-setup) -n machine01 -k ecdsa --bits 521
wget
# Test with dry-run bash <(wget tiny.cc/new-setup -o /dev/null -O -) -n machine01 -k ecdsa --bits 521 --dry-run # Run the code bash <(wget tiny.cc/new-setup -o /dev/null -O -) -n machine01 -k ecdsa --bits 521
Download the script and run manually:
# download via curl curl -L tiny.cc/new-setup -o newsetup # or wget wget tiny.cc/new-setup -O newsetup chmod +x newsetup # Test with dry-run ./newsetup -n machine01 -k ecdsa --bits 521 --dry-run # Run the code ./newsetup -n machine01 -k ecdsa --bits 521
General usage ====
Setup hostname with -n | --name flag ****
When running this on a linux machine, newsetup will use the hostnamectl program to setup hostname.
And running on a macOS, it will use scutil program to setup hostname.
Generate ssh-keys with -k | --keygen flag ****
Generating ssh keys with newsetup is fairly easy. Use the -k or --keygen flag with the following type dsa, ecdsa, ed25519 or rsa. By default, keys will be stored in the ~/.ssh directory. To change the location use the --dir flag. There is also the --bits flag available to add bit size for a particular key type. Check ssh-keygen manual for more info.
Get usage menu with -h | --help flag ****
For more information please check the usage menu.
Contributing ====
Any contributions or suggestions for improvements are always welcome. Please see contributing for more info.
Issues ==== Please report issues, bugs, improvements on issues page.
License ====
This project is under the MIT license.