db2prereqcheck is a tool IBM provides to check for all OS and software prerequisites prior to and during the installation of Db2. It is included with every fixpack and base code that Db2 provides.<\/p>\n
Use db2prereqcheck after placing Db2 code (base code or a fix pack) on a server, but before running db2_install, db2setup, or installFixPack. db2prereqcheck is not a substitute for other preparation work. It is still critical to make sure you have the right code, read the readme, and all of the other details that go with an install, upgrade, or fix pack update. If installing, upgrading, or updating an HADR cluster, db2prereqcheck should also be run on all standby servers, in addition to the primary server. The install processes also call db2prereqcheck, but if db2prereqcheck fails at that point, then the install itself fails. It is better to know ahead of time, especially if the install process is being run during an outage window. While it may be less time-critical to run db2prereqcheck ahead of time during a new server build, it still provides valuable information like which Linux packages you may need to install prior to installing Db2. It is much cleaner to run it first, before executing your chosen install method.<\/p>\n
While db2prereqcheck can be executed with no options, it performs checks for all versions and pureScale if you execute it that way.<\/p>\n
There are actually a surprisingly large number of options for executing db2prereqcheck. The syntax diagram, minus the pureScale options, looks like this:<\/p>\n
>>-db2prereqcheck--+--------------------------+----------------->\n +- -v--version-------------+\n '-+-----+--+-------------+-'\n '- -l-' '-f--xml_file-' \n>--+--------------------------------+--+----------------+------->\n +-c------------------------------+ '-o--output-file-' \n '- -p--| Db2-pureScale-options |-' \n>--+---+--+---+--+---+----------------------------------------->< \n '-s-' +-u-+ '-i-'\n '-g-'<\/code><\/pre>\n