ssh-add: added simplest command and split into platforms

pages/linux/ssh-add.md

@@ -1,9 +1,12 @@
 # ssh-add
 
-> Manage loaded RSA or DSA keys in the ssh-agent.
+> Manage loaded ssh keys in the ssh-agent.
+> Ensure that ssh-agent is up and running for the keys to be loaded in it.
 
-- Add a new key to the ssh-agent:
+- Add the standard ssh key, e.g. {{id_rsa}}, to the ssh-agent:
+`ssh-add`
 
+- Add a specific new key to the ssh-agent:
 `ssh-add {{path/to/private_key}}`
 
 - List fingerprints of currently loaded keys:
@@ -17,7 +20,3 @@
 - Delete all currently loaded keys from the ssh-agent:
 
 `ssh-add -D`
-
-- For MacOS: Add a key to the ssh-agent and the keychain:
-
-`ssh-add -K {{path/to/private_key}}`

pages/osx/ssh-add.md

@@ -0,0 +1,26 @@
+# ssh-add
+
+> Manage loaded ssh keys in the ssh-agent.
+> Ensure that ssh-agent is up and running for the keys to be loaded in it.
+
+- Add the standard ssh key, e.g. {{id_rsa}}, to the ssh-agent:
+`ssh-add`
+
+- Add a specific new key to the ssh-agent:
+`ssh-add {{path/to/private_key}}`
+
+- List fingerprints of currently loaded keys:
+
+`ssh-add -l`
+
+- Delete a key from the ssh-agent:
+
+`ssh-add -d {{path/to/private_key}}`
+
+- Delete all currently loaded keys from the ssh-agent:
+
+`ssh-add -D`
+
+- Add a key to the ssh-agent and the keychain:
+
+`ssh-add -K {{path/to/private_key}}`