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Technical notes

7 posts

Some useful technical notes related to my work will be kept in this Tech section.

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Installing Tractor on Mac

Nov 15, 2024
2 minutes read

1. Preparations 1.1. Install Command Line Tools for Xcode If you have not installed Xcode, please install it from the App Store. After installation, open a terminal and type: ......

Tech

- Tractor
- photometry

Useful Table Access Protocol (TAP) URLs for Astronomers

Sep 23, 2024
One minute read

Table Access Protocol (TAP) is a service protocol for accessing general table data, especially astronomical catalogs. For a detailed introduction to TAP, please refer to the IVOA TAP document. ......

Tech

- database
- TAP
- ADQL
- Topcat

How to install IRAF and PyRAF on a M1/M2 (Apple Silicon) Mac?

Jan 20, 2024
5 minutes read

How to install IRAF and PyRAF on a M1/M2 (Apple Silicon) Mac?

This tutorial is for installing IRAF Community Distribution and PyRAF on a M1/M2 (Apple Silicon) Mac. The following steps are tested on Mac OS Sonoma 14.2.1 with M1 chip. ......

Tech

- IRAF
- PyRAF
- Conda
- Mac

Local port forwarding examples

Sep 14, 2022
2 minutes read

For more information, please see this SSH tutorial. 1. Forward agnkiaa:9000 to localhost:8080 The webpage running on agnkiaa:9000 cannot be accessed from remote clients. To visit the webpage from the local computer, we can forward the port 9000 of the host agnkiaa to the 8080 port (or any other port number you like) of localhost: ......

Tech

- ssh
- Linux
- Ubuntu

Create and manage SSH keys for authentication to a Linux server

Aug 2, 2022
One minute read

Create and manage SSH keys for authentication to a Linux server

Say the hostname of the server is agnkiaa (e.g. set in your local /etc/hosts file), with its ip address being 162.***.***.***, we can set up SSH keys following the steps below. ......

Tech

- Ubuntu
- Linux
- SSH