Update README
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							@ -137,20 +137,36 @@ Stop jails
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----------
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`gocage stop test`
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Update jails  
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To update jail patch version, use gocage update :  
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`gocage update test`
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Update basejails/releases  
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To update basejails, you need to update the release they are base on. Specify release with -r, and the datastore storing concerned release with -d :  
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`gocage update -d fastgocage -r 14.1-RELEASE`
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Upgrade jails  
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To upgrade jail to newer release, use gocage upgrade :  
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`gocage upgrade -r 13.2-RELEASE test`
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A pre-upgrade snapshot wil be made so we can rollback if needed.  
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A pre-upgrade snapshot wil be made so you can rollback if needed.  
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Upgrading basejail/release
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Upgrading basejails currently needs to be done manually, for each jail.  
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The idea is to stop the jail, change the content of its fstab file to point to the new release, then start jail.  
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If one change the fstab while the jail is running, its system directories won't be unmounted at stop time and this will provoke stop errors.  
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To minimize downtime, the change could be scripted:  
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`gocage stop jail1
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sed -i .bak 's/14.0-RELEASE/14.1-RELEASE/' /iocage/jails/jail1/fstab
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# Avoid race-condition by waiting for the update in fstab
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until grep -q 14.1-RELEASE /iocage/jails/jail1/fstab; do sleep 0.2; done
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gocage start jail1`
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You can now update ports.
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Delete jails  
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