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wiki:upgrade_keros5:keros_custo:upgrade [2025/05/28 10:39]
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-====== System upgrade ====== 
- 
-===== Introduction ===== 
- 
-==== Software upgrade files ==== 
- 
-The firmware is released in two formats: __KerOS__ and __Liveburner__. 
-These have very different behavior, so please use the appropriate file before updating, see the difference in [[.:​upgrade#​upgrade_process| upgrade process]] section. 
- 
-==== Major firmware upgrades ==== 
- 
-=== From KerOS version 4.3.3 to KerOS version 5.X === 
- 
-To upgrade the system from KerOS version 4.3.3 to KerOS version 5.X the use of a liveburner is mandatory. ​ 
-Two possibilities are available: 
- 
-  * Upgrade with a custom liveburner. It allows to keep some elements like gateway configuration. To use a custom liveburner, please refer to the dedicated page: [[wiki:​keros_custo:​upgrade_major_version|Major version upgrade with a custom liveburner]] 
-  * Upgrade with a regular liveburner (erasing the whole partition to reinstall the firmware). Use the liveburner provided in the [[wiki:​firmware:​lastversion | 5.X last version]] and the upgrade process below. 
- 
- 
-=== From KerOS version 3.x to KerOS version 4.1 === 
- 
-The upgrade from KerOS version 3.x to KerOS version 4.1 directly is not recommended by Kerlink. To do so, it must be done in 2 steps: 
-  - Upgrade to KerOS version 4.0 using a liveburner 
-  - Upgrade from KerOS version 4.0 to KerOS version 4.1 using a KerOS package 
- 
- 
-=== From KerOS version 3.x to KerOS version 4.0 === 
- 
-To upgrade the system from KerOS version 3.x to KerOS version 4.0 the use of a liveburner is mandatory. ​ 
-Two possibilities are available: 
- 
-  * Upgrade with a custom liveburner. It allows to keep some elements like gateway configuration. To build a custom liveburner, please refer to the dedicated page: [[wiki:​keros_custo:​upgrade_keros3_to_4|Upgrade from KerOS version 3.x to 4.0]] 
-  * Upgrade with a regular liveburner (erasing the whole partition to reinstall the firmware). Use the liveburner provided in the [[wiki:​keros_custo:​upgrade_keros3_to_4|Upgrade from KerOS version 3.x to 4.0]] page and the upgrade process below. 
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-===== Upgrade process ===== 
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-==== Upgrade using a KerOS package ==== 
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-Upgrade using a KerOS package (i.e. ''​keros_4.X.Y_klk-lpbs-signed.ipk''​ file) could be done only with the same major version. \\ 
-Example: \\ 
-  * Upgrade from Keros 4.X.X to KerOS 4.Y.Y is possible with a KerOS package (same major version) 
-  * Upgrade from Keros 4.X.X to KerOS 5.X.X is not possible with a KerOS package (major version is different) 
- 
-The upgrade will install the new KerOS firmware with some consequences on the data: 
-  * User partition files will be preserved. 
-  * Passwords will be preserved. 
-  * The stock restore version will not be updated. 
-  * RootFS modifications will NOT be kept except files indicated in [[#​configuration_management_sysupgrade|sysupgrade]] configuration files 
- 
-The upgrade process itself is the following sequence: 
-  - Backup files indicated in configuration (system files and software/​customer defined files). 
-  - Remove hotfix packages. 
-  - Upgrade the system itself. 
-  - Restore sysupgrade files => will override new firmware files!! 
- 
-To upgrade your system, follow the software update process. Information [[wiki:​keros_custo:​sw_updates|here]]. 
- 
-==== Upgrade using a liveburner package ==== 
- 
-===== Configuration management (sysupgrade) ===== 
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-===== Hotfix packages management ===== 
-