SKM is a simple and powerful SSH Keys Manager. It helps you to manage your multiple SSH keys easily!
- Create, List, Delete your SSH key(s)
- Manage all your SSH keys by alias names
- Choose and set a default SSH key
- Display public key via alias name
- Copy default SSH key to a remote host
- Rename SSH key alias name
- Backup and restore all your SSH keys
- Prompt UI for SSH key selection
- Customized SSH key store path
brew tap timothyye/tap brew install timothyye/tap/skm
go get github.com/TimothyYe/skm/cmd/skm
Download it from releases and extact it to /usr/bin or your PATH directory.
% skm SKM V0.8.1 https://github.com/TimothyYe/skm NAME: SKM - Manage your multiple SSH keys easily USAGE: skm [global options] command [command options] [arguments...] VERSION: 0.8.1 COMMANDS: init, i Initialize SSH keys store for the first time usage. create, c Create a new SSH key. ls, l List all the available SSH keys. use, u Set specific SSH key as default by its alias name. delete, d Delete specific SSH key by alias name. rename, rn Rename SSH key alias name to a new one. copy, cp Copy current SSH public key to a remote host. display, dp Display the current SSH public key or specific SSH public key by alias name. backup, b Backup all SSH keys to an archive file. restore, r Restore SSH keys from an existing archive file. cache Add your SSH to SSH agent cache via alias name. help, h Shows a list of commands or help for one command. GLOBAL OPTIONS: --store-path value Path where SKM should store its profiles (default: "/Users/timothy/.skm") --ssh-path value Path to a .ssh folder (default: "/Users/timothy/.ssh") --restic-path value Path to the restic binary --help, -h show help --version, -v print the version
For the first time use
You should initialize the SSH key store for the first time use:
% skm init ✔ SSH key store initialized!
So, where are my SSH keys?
SKM will create SSH key store at
$HOME/.skm and put all the SSH keys in it.
NOTE: If you already have id_rsa & id_rsa.pub key pairs in
$HOME/.ssh, SKM will move them to
Create a new SSH key
NOTE: Currently ONLY RSA and ED25519 keys are supported!
skm create prod -C "email@example.com" Generating public/private rsa key pair. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /Users/timothy/.skm/prod/id_rsa. Your public key has been saved in /Users/timothy/.skm/prod/id_rsa.pub. ... ✔ SSH key [prod] created!
List SSH keys
% skm ls ✔ Found 3 SSH key(s)! -> default dev prod
Set default SSH key
% skm use dev Now using SSH key: dev
Prompt UI for key selection
You can just type
skm use, then a prompt UI will help you to choose the right SSH key:
Display public key
% skm display
Or display specific SSH public key by alias name:
% skm display prod
Delete a SSH key
% skm delete prod Please confirm to delete SSH key [prod] [y/n]: y ✔ SSH key [prod] deleted!
Copy SSH public key to a remote host
% skm cp firstname.lastname@example.org /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/Users/timothy/.skm/default/id_rsa.pub" /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys email@example.com's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'firstname.lastname@example.org'" and check to make sure that only the key(s) you wanted were added. ✔ Current SSH key already copied to remote host
Rename a SSH key with a new alias name
% skm rn test tmp ✔ SSH key [test] renamed to [tmp]
Backup SSH keys
Backup all your SSH keys to $HOME directory by default.
% skm backup a . a ./test a ./default a ./dev a ./dev/id_rsa a ./dev/id_rsa.pub a ./default/id_rsa a ./default/id_rsa.pub a ./test/id_rsa a ./test/id_rsa.pub ✔ All SSH keys backup to: /Users/timothy/skm-20171016170707.tar
If you have restic installed then you can also use that to create backups of your SKM store:
# First, you need a password for your repository % if [[ ! -f ~/.skm-backups.passwd ]]; then % openssl rand -hex 64 > ~/.skm-backups.passwd % fi % skm backup --restic repository ... opened successfully, password is correct Files: 0 new, 1 changed, 4 unmodified Dirs: 0 new, 0 changed, 0 unmodified Added to the repo: 1.179 KiB processed 5 files, 2.593 KiB in 0:00 snapshot $SNAPSHOT saved ✔ Backup to /Users/$USER/.skm-backups complete
Restore SSH keys
% skm restore ~/skm-20171016172828.tar.gz x ./ x ./test/ x ./default/ x ./dev/ x ./dev/id_rsa x ./dev/id_rsa.pub x ./default/._id_rsa x ./default/id_rsa x ./default/._id_rsa.pub x ./default/id_rsa.pub x ./test/id_rsa x ./test/id_rsa.pub ✔ All SSH keys restored to /Users/timothy/.skm
Again, SKM also supports restic to create and restore backups:
% skm restore --restic --restic-snapshot $SNAPSHOT repository $REPO opened successfully, password is correct restoring <Snapshot $SNAPSHOT of [/Users/$USER/.skm] at 2018-10-03 19:40:33.333130348 +0200 CEST by $USER@$HOST> to /Users/$USER/.skm ✔ Backup restored to /Users/$USER/.skm
Integrate with SSH agent
You can use
cache command to cache your SSH key into SSH agent’s cache via SSH alias name.
Cache your SSH key
λ tim [~/] → skm cache --add my Enter passphrase for /Users/timothy/.skm/my/id_rsa: Identity added: /Users/timothy/.skm/my/id_rsa (/Users/timothy/.skm/my/id_rsa) ✔ SSH key [my] already added into cache
Remove your SSH key from cache
λ tim [~/] → ./skm cache --del my Identity removed: /Users/timothy/.skm/my/id_rsa (MyKEY) ✔ SSH key [my] removed from cache
List your cached SSH keys from SSH agent
λ tim [~/] → ./skm cache --list 2048 SHA256:qAVcwc0tdUOCjH3sTskwxAmfMQiL2sKtfPBXFnUoZHQ /Users/timothy/.skm/my/id_rsa (RSA)
Customized SSH key store path
By default, SKM uses
$HOME/.skm as the default path of SSH key store.
You can define your customized in your
~/.zshrc by adding:
Edit and place a executable file named
hook at the specified key directory, for example:
This hook file can be both an executable binary file or an executable script file.
SKM will call this hook file after switching default SSH key to it, you can do some stuff in this hook file.
For example, if you want to use different git username & email after you switch to use a different SSH key, you can create one hook file, and put shell commands in it:
#!/bin/bash git config --global user.name "YourNewName" git config --global user.email "YourNewEmail@example.com"
Then make this hook file executable:
chmod +x hook
SKM will call this hook file and change git global settings for you!