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SSH Tectia 
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    About This Document >>
    Installing SSH Tectia Server for IBM z/OS >>
        Preparing for Installation >>
            System Requirements
            Permission Requirements
            System Limit Requirements
            Directories and Datasets
        Upgrading Previously Installed Secure Shell Software >>
        Installing the SSH Tectia Server for IBM z/OS Software >>
    Getting Started with SSH Tectia Server for IBM z/OS >>
    Setting up Non-Interactive Server and User Authentication >>
    Setting up Non-Interactive Secure File Transfer >>

Directories and Datasets


The directory structure under Unix System Services (USS) is shown below. The space requirements are approximate upper limits.

  • /opt/tectia

    Contains executable binaries, setup scripts, configuration files, server key files, manual pages, documentation, license agreement, example JCL scripts.

    Space: 200 MB, 250 Cyls, read/write

    After running the setup script, SSH Tectia Server for IBM z/OS consists of a directory structure under /opt/tectia. You may create a symbolic 'tectia' link to the place where the directory structure resides under /opt or you may want to create a separate HFS or zFS file system for it.

  • $HOME/.ssh2

    Each z/OS user account that runs SSH client programs or accesses the server must have a USS home directory ($HOME, for example, /u/home1/username). The system will create the .ssh2 directory under the home directory. It contains the user's configuration files and keys.

    Space: 128 kB, read/write

    The runtime programs of SSH Tectia Server for IBM z/OS create the $HOME/.ssh2 directories as needed. If you want these directories to be a link to some other spot in your directory hierarchy, create the link before running the program.

  • /tmp

    Contains server process ID files and the default STDOUT and STDERR. Used also temporarily during installation.

    Space: 256 kB (300 MB during installation), read/write/sticky.

    The /tmp directory must exist in advance and it must be user-writable and have the sticky bit on.

    The sticky attribute for /tmp can be checked by observing the output of ls(1) and verifying that the letter t is present in the permissions field:

    :> ls -ld /tmp/.
    drwxrwxrwt  89 WEBSRV   SYS1       49152 Apr 11 14:43 /tmp/.

    If the permissions differ from rwxrwxrwxt, they must be adjusted with chmod(1):

    :> chmod 1777 /tmp/.

  • /tmp/ssh-username

    Contains users' temporary files used in Secure Shell agent forwarding.

    The agent forwarding status files are temporary and valid only while the actual user process is running.

    Space: 12 kB for each user, read/write


Although this version of SSH Tectia Server for IBM z/OS must be installed in a USS file system and use the directory structure shown above, the server supports the transfer of MVS files and all the programs can be executed in JCL by BPXBATCH, BPXBATSL, and oshell.

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