2017-06-23 10:15:44 +02:00
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# Upgrading Debian 8 -> 9
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## Steps
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1. Create backup (`/etc`, `/home`, `/root`, `/var/lib/mysql`, mysqldump, ...)
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2. Update sources in `/etc/apt/sources.list` and `/etc/apt/sources.list.d/` to stretch
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3. `apt update`
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4. `apt upgrade`
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5. `apt dist-upgrade`
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6. Fix errors and warnings and _only then_ `reboot`
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7. `dpkg -l | grep -v ^ii` should be empty or packages should be removed
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8. `reboot`
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9. test
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## Known problems
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### fail2ban
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Some configuration changes, e.g. multiple `ignore` directives are no longer allowed, so
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```
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ignore = 127.0.0.1/8
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ignore = 10.0.0.1/8
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```
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becomes
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```
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ignore = 127.0.0.1/8 10.0.0.1/8
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```
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### IPv6
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`/etc/rc.local`
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```
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/sbin/ip -6 addr add <ipv6-address>/64 dev eth0
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/sbin/ip -f inet6 route add <ipv6-gateway> dev eth0 # this one is new
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/sbin/route -A inet6 add default gw <ipv6-gateway> dev eth0
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```
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2017-06-25 21:21:01 +02:00
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### dnscrypt
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Switch from init.d script to systemd. Systemd script can be obtained from the [Arch
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Wiki](https://wiki.archlinux.org/index.php/DNSCrypt)
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