github_api_delete_id_rsa_via_id.sh

#!/bin/sh
# this bash is base on  https://developer.github.com/v3/users/keys/#create-a-public-key
username='yourname'
password='yourpassword'
id_to_delete='123'
curl -X DELETE  https://api.github.com/user/keys/$id_to_delete -u "$username:$password"

github_api_upload_id_rsa.sh

#!/bin/sh
# this bash is base on  https://developer.github.com/v3/users/keys/#create-a-public-key
username='yourname'
password='yourpassword'
id_rsa_title='upload_title'
id_rsa_pub_path='~/.ssh/id_rsa.pub'
data_to_post="{\"title\":\"$id_rsa_title\",\"key\":\"`cat $id_rsa_pub_path`\"}"
curl --data "$data_to_post" https://api.github.com/user/keys -u "$username:$password"