Preparing for initial installation

If POSIX has not previously been run on the system, the following steps must be taken:

• Before you start the POSIX subsystem, remove the CPU limit of the system ID SYSROOT.

  This is necessary to permit the POSIX daemons started as batch tasks under the SYSROOT ID to run without CPU limit (NTL) and thus during the entire service life of the POSIX subsystem.

  Two options are available:

  1. Set the account privilege of the SYSROOT ID to NO-CPU-LIMIT= *YES if the default batch job class (or optionally the default POSIX job class) of the SYSROOT ID is defined with NO-CPU-LIMIT=*NO.

     Example

     /MODIFY-USER-ATTRIBUTES USER-IDENTIFICATION=SYSROOT, -
     /       ACCOUNT-ATTRIBUTES=*MODIFY(ACCOUNT=SYSACC, -
     /           PRIVILEGE=*PARAMETERS(NO-CPU-LIMIT=*YES))
     

  2. Alternatively you can define the default job classes assigned to the SYSROOT ID (batch and POSIX) with NO-CPU-LIMIT=*YES.

• Unlock the user ID SYSROOT:

  /UNLOCK-USER USER-ID=SYSROOT