# Upgrading Debian packages on UC Series

# Deprecated, please go https://guide.iiot.party/operations/debian-upgrade/

## General(system-wide) Upgrade
1. Update the Debian package lists

moxa@Moxa:~$ sudo apt-get update

2. Perform the upgrade command

moxa@Moxa:~$ sudo apt-get upgrade

Review the output messages and type "y" to confirm.

## Upgrade a specific Debian package

1. Update the Debian package lists

    moxa@Moxa:~$ sudo apt-get update

1. Query the version information, confirm you could get the latest version on moxa reposiroty.

    moxa@Moxa:~$ sudo apt-cache policy uc8100me-syskernel
    uc8100me-syskernel:
      Installed: 2.3.0+memory
      Candidate: 2.3.1
      Version table:
         2.3.1 0
            500 http://debian.moxa.com/debian/ jessie/main armhf Packages
     *** 2.3.0+memory 0
            100 /var/lib/dpkg/status
         2.1.0 0
            500 http://debian.moxa.com/debian/ jessie/main armhf Packages

> In above case, we are trying to upgrade package "uc8100me-syskernel" and you can see the **Installed**, **Candidate** version is different. Candidate version is the one when we trying to install from remote what we will get.

1. Update a package by name

    moxa@Moxa:~$ sudo apt-get install uc8100me-syskernel

Here is the example output

    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    The following packages will be upgraded:
      uc8100me-syskernel
    1 upgraded, 0 newly installed, 0 to remove and 71 not upgraded.
    Need to get 9,780 kB of archives.
    After this operation, 414 kB disk space will be freed.
    Get:1 http://debian.moxa.com/debian/ jessie/main uc8100me-syskernel armhf 2.3.1 [9,780 kB]
    Fetched 9,780 kB in 10s (911 kB/s)
    (Reading database ... 25723 files and directories currently installed.)
    Preparing to unpack .../uc8100me-syskernel_2.3.1_armhf.deb ...
    Unpacking uc8100me-syskernel (2.3.1) over (2.3.0+memory) ...
    Setting up uc8100me-syskernel (2.3.1) ...
    *** System successfully updated. ***
    *** Please reboot the system...***

As you can see, `Unpacking uc8100me-syskernel (2.3.1) over (2.3.0+memory) ...`. Now the package version of `uc8100me-syskernel` is `2.3.1` instead of the old version.

1. Reboot

1. Verify version (optional)

    moxa@Moxa:~$ dpkg -l | grep uc8100me-syskernel
    ii  uc8100me-syskernel            2.3.1                            armhf        Linux kernel modules on UC-8112-ME series

If the installation isn't success, the `ii` will be something else.