How to convert .ico files to .png - Linux

# convert start_server.ico start_server.png

bash: convert: command not found...

Install package 'ImageMagick' to provide command 'convert'? [N/y]

 * Running..

 * Resolving dependencies..

 * Waiting for authentication..

 * Waiting in queue..

 * Resolving dependencies..

 * Downloading packages..

 * Testing changes..

 * Installing packages..

 * Scanning applications..

# convert start_server.ico start_server.png