Arnaud Taddei CN/DCI
In the last CNL issue, we presented an article about the uco command which is a user reset command. It helps users who have afs accounts (the recommended file system to use the central services such as cernsp, hpplus or the Work Group Servers) to reset several files and directories which are used to configure their environment.
In the previous article we showed how to get the default HEPIX X11 environment. Now we describe how to update the Home directory structure.
There are several reasons why you may need to update the structure of your Home directory:
As an example, in the last few months several new versions of operating systems have been introduced: Solaris 2.4, AIX 4.1, OSF1 3.2C.
On afs, when you want to access an executable file, you have to put it into a directory named $HOME/bin which is a link to $HOME/.@sys/bin where @sys represents the reference to the current operating system name (in the afs naming scheme). If you list the files and directories of your $HOME, you will find many things and amongst them, you might have directories like:
.rs_aix32 .sun4m_53 .alpha_osf1or links like:
.sun4m_52 -> .sun4m_53 .rs_aix41 -> .rs_aix32
Then, assuming you are working on an AIX 3.2 machine and you want to access one of your programs that you compiled for this architecture, you put this program under $HOME/rs_aix32/bin and you just need to issue the command name to run it. Indeed the HEPiX $PATH variable includes the segment: $HOME/bin which is a link to $HOME/.@sys/bin which refers to $HOME/rs_aix32/bin. Now, if you connect to an AIX 4.1 machine (and you know that the program compiled on AIX 3.2 should work on this new version), you should create a link .rs_aix32 in your $HOME directory. Without it you cannot access your command. For this You need to issue the uco -home command to update the structure of your Home directory by entering:
uco -homeIt will display:
Home's possible actions: 0 - Cancel. 1 - Reset the structure of your HOME directory. Choice:Choose 1 and several new directories and links will appear.
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