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# Upgrading Cacti Under UNIX Compatible Operating Systems
To upgrade Cacti under UNIX style operating systems is very strait
forward. To upgrade Cacti on Windows, you should use the instructions
in the Link below:
[Upgrading in Windows](Upgrading-Cacti-Under-Windows.md)
Before you begin, generally both your Apache/NGINX and your Crontab or
systemd based pollers should run as the same account. In most Linux
operating systems these days, that'll be the `apache` account. Under
SLES, it'll be `www-run`. For this guide, we will use the `apache` account
but please keep this in mind before starting.
1. Backup the old Cacti database.
```sh
shell> mysqldump -l --add-drop-table --lock-tables=false cacti > mysql.cacti
```
> **NOTE:** You will probably have to specify the -u and -p flags for the
> MySQL username and password. This user must have permission to read from
> Cacti's database or you will end up with an empty backup.
2. Backup the old Cacti directory with the exception of the RRDfiles which
should not need backup.
```sh
shell> tar --exclude=*.rrd -zcf cacti_backup_YYYYMMDD.tgz cacti
```
3. Extract the distribution tarball.
```sh
shell> tar -xzvf cacti-version.tar.gz
```
4. Copy the distribution tarball over the existing installation.
```sh
shell> /bin/cp -rpf cacti-version cacti
```
5. Set the appropriate permissions on Cacti's directories for graph/log
generation. You should execute these commands from inside Cacti's directory
to change the permissions.
```sh
shell> chown -R apache:apache rra/ log/
```
(Enter a valid username for cactiuser, this user will also be used in the
next step for data gathering.)
6. If you are using the optional feature `Performance > Image Caching`, or
Realtime Graphing, then recreate the `cache` folder and correct the permissions.
```sh
shell> mkdir cache
shell> chown -R apache:apache cache
```
7. Point your web browser to:
`http://your-server/cacti/`
Follow the on-screen instructions so your database can be updated to the
new version.
> NOTE: That starting with Cacti 1.0, all **Data Collectors** will upgrade
> themselves automatically within two polling cycles. If for some reason they
> do not, upgrade them one at a time using the procedure above.
---
<copy>Copyright (c) 2004-2023 The Cacti Group</copy>
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