Preparing your Linux system

Learn the steps that are required to plan and prepare your TXSeries® system on Linux®. It also provides details on the prerequisites for installing the product.

The prerequisites for installing TXSeries are:

TXSeries installation requires root authority.
The disk space requirements are listed in Table 1.
TXSeries supports installation on different locales. If you are installing on a non-English locale, use the appropriate supported locales that are listed in Table 2.
TXSeries supports the display of console, CSMT.out, SFS server msg files, and the PPC Gateway server msg files in the UTF-8 code page. The display does not require the respective locale to be set to UTF-8. However, the UTF-8 code page must be available in the system for the display of messages.
Installation location ($CICSPATH) is /opt/ibm/cics64/11.1.

For TXSeries 11.1 on Red Hat® Enterprise Linux:

ksh
gawk
libstdc++.x86_64
ncurses-libs.x86_64
ncurses-compat-libs.x86_64 (applicable only for Red Hat Enterprise Linux 8)
pam.x86_64
glibc.x86_64
glibc-devel.x86_64
libnsl.x86_64
libnsl2-devel.x86_64
libXext.x86_64
libXft.x86_64

For TXSeries 11.1 on SUSE Linux Enterprise Server:

ksh
gawk
libstdc++6
libncurses5
libncurses6
ncurses-utils
pam
glibc
glibc-devel
libnsl2
libXext6
libXft2

For TXSeries 11.1 on Oracle Linux:

ksh
gawk
libstdc++.x86_64
ncurses-libs.x86_64
pam.x86_64
glibc.x86_64
glibc-devel.x86_64
libnsl.x86_64
libnsl2-devel.x86_64
libXext.x86_64
libXft.x86_64

For TXSeries 11.1 on Ubuntu:

ksh
gawk
libstdc++6
libncurses5
libncurses6
libpam-modules
libc6
libnsl2
net-tools

Table 1. Disk space required for Linux
Prerequisites	Minimum disk space
Disk space in installation location	1 GB
Disk space in /tmp/	1 GB
Disk space in /var/	100 MB

Note: The minimum disk space that is mentioned for /var/ is for one region and one SFS server configuration. The total space that is required in your system depends on multiple factors, like, number of regions, SFS servers, PPC Gateway servers, Telnet servers, TXSeries logs, dumps, crash dumps, and so on.

Table 2. Supported locales for Linux
Language	Locale	Code page
US English	en_US	ISO88591
German	de_DE	ISO88591
Spanish	es_ES	ISO88591
French	fr_FR	ISO88591
Italian	it_IT	ISO88591
Brazilian Portuguese	pt_BR	ISO88591
Korean	ko_KR	eucKR
Japanese (MBCS EUC)	ja_JP.eucJP	eucJP
Japanese (DBCS PC)	ja_JP.sjis	SJIS
Simplified Chinese	zh_CN	gb18030
Traditional Chinese	zh_TW	big5

Note: The TXSeries for Multiplatforms product setup program requires a working directory for its resources. By default, this directory is created in /tmp. Ensure that enough space is available in /tmp. If space is not available, the installer uses space in the system root directory. Alternatively, you can also set a working directory in another location by using the environment variable IATEMPDIR. For example:

IATEMPDIR=/mytemp
export IATEMPDIR

If the working directory is too small, the necessary resources cannot be set up and the installation process might fail.

System modifications for running TXSeries on Linux

Complete the following:

Set the semaphore kernel parameter limit to a minimum of kernel.sem=250 320000 250 1280 in /etc/sysctl.conf file.
Set the following environment variables if you are using cicsteld to connect to the TXSeries region:
```
SARPC_SUPPORTED_PROTSEQS=ncadg_ip_udp:ncacn_cics_ipc
```
If you have configured cicsteld server, add the following line in cicsteld script that is located in the /var/cics_clients/ directory.
```
export SARPC_SUPPORTED_PROTSEQS=ncadg_ip_udp
```

TXSeries requires the following minimum ulimit values for the Linux operating system:

nproc: Specifies the limit of number of processes per user. Set nproc to a minimum value of 32767. To set this value, run the command ulimit -u 32767.
nofiles: Max number of open files and/or sockets per process. Set nofiles to a minimum value of 32767. To set this value, run the command ulimit -n 32767.