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Trying to document myself before doing this upgrade I've found some contradictory posts in the forums that still keep me unsure how to proceed. In essence, options are:
A.- Going the full way, step by step through all these:
2.2.2 to 2.2.3a upgrade
2.2.3a to 2.2.4 upgrade
2.2.5 full version (no upgrade patch is available)
2.2.5 security patch
2.2.5 to 2.2.6 upgrade
B.- Skip some of those steps: probably the first two, since 2.2.5 full will overwrite everything previous; and most likely the security patch, which should be covered well enough by 2.2.6 upgrade. Hence, only two steps would remain:
Overwrite 2.2.2 with 2.2.5 full
2.2.5 to 2.2.6 upgrade
C.- Forget all about the gradual approach and just apply 2.2.6 full version directly on top of 2.2.2
From what is said in the UPDATE.html instructions that come with the 2.2.6 full package, I gather that option C.- should be OK. Those instructions state "Upgrade From Previous 2.2.x", so I understand that applies to 2.2.2 as well.
However, I've read somewhere that if you do it like that things may not turn up well, and that option B.- might be safer. This doesn't make much sense to me, but certainly I'd love to hear some advice from you before I start messing up my site.
BTW, the 2.2.6 UPDATE.html literally instructs to "Upload the 2.2.x files, overwriting existing files", but I assume before that chmod 444 should be applied in order to protect mainfile.php, right? If so, that would better be noted in the instructions, don't you think?.
Thanks for reading me and please have a nice day.
MD