Tested on 18.04. Download postman from https://dl.pstmn.io/download/latest/linux
tar -xzf Postman-linux-<VERSION>.tar.gzIf any version is installed before, remove it.
sudo rm -rf /opt/PostmanMove Postman
sudo mv Postman /opt/PostmanCreate a symbolic link
sudo ln -s /opt/Postman/Postman /usr/bin/postmanCreate a desktop file
cat > ~/.local/share/applications/postman.desktop <<EOL
[Desktop Entry]
Encoding=UTF-8
Name=Postman
Exec=postman
Icon=/opt/Postman/app/resources/app/assets/icon.png
Terminal=false
Type=Application
Categories=Development;
EOL
Remove the tar:
rm Postman-linux-<VERSION>.tar.gz