How do I tell which AIX version am I running?

5 Answers 5


You are correct in the fact that oslevel will give you the current installed version, but that is not always enough information particularily if you are asked the question by support personnel.

# oslevel <--- this will only give you the Base Level

To be more precise you should use the following command which will give you additional Technology Level, Maintenance Level and Service Pack level information.

    # oslevel -s

This will give you

  • "5300" - Base Level
  • "09" - Technology Level
  • "02" - Maintenance Level
  • "0849" - Service Pack

On some older versions of AIX the -s option is not available in whichh cas you should use the -r option which will report as far as the Technology level

I hope this helps

Mike Scheerer

  • This is actually wrong. In your example 5300-09-02-0849, 09 is Technology Level, 02 is Service Pack number and 0849 is just the date of Service Pack release (49th week of the year 2008). Maintenance Level is just an old name for Technology Level.
    – kubanczyk
    Jun 10, 2010 at 20:33

I just added this to my ~/.profile, so I immediately see the AIX version on login:

function aixversion {
  OSLEVEL=$(oslevel -s)
  AIXVERSION=$(echo "scale=1; $(echo $OSLEVEL | cut -d'-' -f1)/1000" | bc)
  AIXTL=$(echo $OSLEVEL | cut -d'-' -f2 | bc)
  AIXSP=$(echo $OSLEVEL | cut -d'-' -f3 | bc)
  echo "AIX ${AIXVERSION} - Technology Level ${AIXTL} - Service Pack ${AIXSP}"

Example output:

AIX 7.1 - Technology Level 3 - Service Pack 1

nb: This function is compatible with both KSH and BASH, so you can put in ~/.bashrc instead if you are a BASH fan.

nb2: The last 4 digits from oslevel are the year and week the SP was released. I don't particularly care to see that, so I left it out. I was happy enough with Version/TL/SP.

EDIT 2018-02-22: I just came up with an equivalent but shorter implementation, and no longer depends on bc and uses awk instead of cut & bc.

As a one-liner:

oslevel -s | awk -F- '{printf "AIX %.1f - Technology Level %d - Service Pack %d\n",$1/1000,$2,$3}'


AIX 5.3 - Technology Level 9 - Service Pack 2

As a shell function:

aixversion() {
  oslevel -s | awk -F- '{printf "AIX %.1f - Technology Level %d - Service Pack %d\n",$1/1000,$2,$3}'



AIX 5.3 - Technology Level 9 - Service Pack 2
$ man oslevel
$ oslevel    <- what I was looking for

You can use "uname" with various options:

$ uname -v
$ uname -r

You can use the following command:

oslevel -s

It will show result like below.


Which translates to:

os version 6.1

TL level 9

service pack 9

release date (year and week)

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