AIX Levels are named based on Release, Technology Level (TL), Service Pack (SP), and Build Sequence Identifier e.g. 7100-05-04-1914. As well as the current OS level, the oslevel command can show details of the TLs and SPs on a server along with details of any up- or down-level filesets.
You can read more in the IBM online documentation but here are the parameters we are interested in:
| Flag | Description |
|---|---|
| -f | Rebuild the cache for this operation |
| -r | All specified flags are applied to technology levels |
| -s | All specified flags are applied to service packs |
| -l level | Lists filesets that are earlier than the specified level |
| -q | Lists the known technology levels or service packs with the latest at the top of the list |
We can confirm that our server is running the latest available level by checking the following:
The following script shows the implementation of these steps and will display all down-level filesets, if applicable:
#!/usr/bin/ksh
return_code=0
echo "Checking oslevel..."
current_oslevel=$(oslevel -fs)
latest_oslevel=$(oslevel -sq 2>/dev/null | sed -n '1p')
if [[ "${current_oslevel}" == "${latest_oslevel}" ]]; then
echo "Current OS Level OK: ${current_oslevel}"
else
current_tl=$(oslevel -r)
latest_tl=$(oslevel -rq 2>/dev/null | sed -n '1p')
if [[ "${current_tl}" == "${latest_tl}" ]]; then
echo "Current Service Pack appears downlevel:"
echo " Latest SP Level: ${latest_oslevel}"
echo " Current SP Level: ${current_oslevel}"
echo
echo "Check the following filesets:"
oslevel -s -l ${latest_oslevel}
return_code=1
else
echo "Current Technology Level appears downlevel:"
echo " Latest TL Level: ${latest_tl}"
echo " Current TL Level: ${current_tl}"
echo
echo "Check the following filesets:"
oslevel -r -l ${latest_tl}
return_code=2
fi
fi
exit ${return_code}