Archive for the ‘UNIX Solution’ Category

Red Hat Enterprise Linux (RHEL) 8.4 – installed on Proxmox 6.4.x and VMware vSphere 7.x

Mittwoch, Juni 16th, 2021

Bundesamt für Sicherheit in der Informationstechnik (BSI) – Schwachstelle bei Samba ≥ 4.0 ist für DoS-Attacken anfällig

Sonntag, Juli 5th, 2020

Abgesichert sind die Samba-Ausgaben 4.10.17, 4.11.11 und 4.12.4

Red Hat Enterprise Linux 7 & CentOS 7 Servers – useful yum command examples

Freitag, September 27th, 2019
To list all available security updates without installing them
# yum updateinfo list security all
# yum updateinfo security
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
              : manager
rhel-7-server-rpms                                       | 3.5 kB     00:00
(1/2): rhel-7-server-rpms/7Server/x86_64/updateinfo        | 3.4 MB   00:01
(2/2): rhel-7-server-rpms/7Server/x86_64/primary_db        |  62 MB   00:19
RHSA-2019:0194 Moderate/Sec.  bind-libs-32:9.9.4-73.el7_6.x86_64
RHSA-2019:1294 Important/Sec. bind-libs-32:9.9.4-74.el7_6.1.x86_64
RHSA-2019:2057 Moderate/Sec.  bind-libs-32:9.11.4-9.P2.el7.x86_64
# yum update –security
# yum update –security –exclude=kernel\*
# yum info samba
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
              : manager
Installed Packages
Name        : samba
Arch        : x86_64
Version     : 4.9.1
Release     : 6.el7
Size        : 1.9 M
Repo        : installed
From repo   : rhel-7-server-rpms
Summary     : Server and Client software to interoperate with Windows machines
URL         :
License     : GPLv3+ and LGPLv3+
Description : Samba is the standard Windows interoperability suite of programs
            : for Linux and Unix.
# yum downgrade samba-4.9.1
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
: manager
No packages marked for update
# yum info openssl
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
              : manager
Installed Packages
Name        : openssl
Arch        : x86_64
Epoch       : 1
Version     : 1.0.2k
Release     : 19.el7
Size        : 814 k
Repo        : installed
From repo   : rhel-7-server-rpms
Summary     : Utilities from the general purpose cryptography library with TLS
            : implementation
URL         :
License     : OpenSSL
Description : The OpenSSL toolkit provides support for secure communications
            : between machines. OpenSSL includes a certificate management tool
            : and shared libraries which provide various cryptographic
            : algorithms and protocols.
# yum downgrade openssl-1.0.2k
# yum update samba -y
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
: manager
No packages marked for update
# yum update openssl -y
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
              : manager
Resolving Dependencies
–> Running transaction check
—> Package openssl.x86_64 1:1.0.2k-16.el7 will be updated
—> Package openssl.x86_64 1:1.0.2k-19.el7 will be an update
–> Processing Dependency: openssl-libs(x86-64) = 1:1.0.2k-19.el7 for package: 1:openssl-1.0.2k-19.el7.x86_64
–> Running transaction check
—> Package openssl-libs.x86_64 1:1.0.2k-16.el7 will be updated
—> Package openssl-libs.x86_64 1:1.0.2k-19.el7 will be an update
–> Finished Dependency Resolution
Dependencies Resolved
 Package          Arch       Version               Repository              Size
 openssl          x86_64     1:1.0.2k-19.el7       rhel-7-server-rpms     493 k
Updating for dependencies:
 openssl-libs     x86_64     1:1.0.2k-19.el7       rhel-7-server-rpms     1.2 M
Transaction Summary
Upgrade  1 Package (+1 Dependent package)
Total size: 1.7 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Updating   : 1:openssl-libs-1.0.2k-19.el7.x86_64                          1/4
  Updating   : 1:openssl-1.0.2k-19.el7.x86_64                               2/4
  Cleanup    : 1:openssl-1.0.2k-16.el7.x86_64                               3/4
  Cleanup    : 1:openssl-libs-1.0.2k-16.el7.x86_64                          4/4
  Verifying  : 1:openssl-libs-1.0.2k-19.el7.x86_64                          1/4
  Verifying  : 1:openssl-1.0.2k-19.el7.x86_64                               2/4
  Verifying  : 1:openssl-libs-1.0.2k-16.el7.x86_64                          3/4
  Verifying  : 1:openssl-1.0.2k-16.el7.x86_64                               4/4
  openssl.x86_64 1:1.0.2k-19.el7
Dependency Updated:
  openssl-libs.x86_64 1:1.0.2k-19.el7

Samba – Security Releases

Mittwoch, August 15th, 2018

Samba – Security Releases


Microsoft Windows 10 – a file level backup *.VHD to the NAS device running samba failed

Samstag, April 8th, 2017

Windows10_logo   The failure happens while the *.VHD file created by Windows Backup is mounted during backup. The *.VHD file is created as a sparse file and this is not supported by the native VHD driver and hence mounting of the .*VHD failed. The „strict allocate = yes“ option of Samba will force it to not have UNIX style behavior of creating sparse file

# vi smb.conf
strict allocate = yes

and enabling SMB Large MTU on Windows Clients

Samba 4.3.0 – mit mehr Active Directory

Mittwoch, September 9th, 2015


Oracle’s Sun Storage Archive Manager – optimized solution for lifecycle content

Mittwoch, Juni 29th, 2011

oracle_logo.jpg   Oracle´s Sun Storage Archive Manger is a proven solution for PACS systems and medical records or documents. This requires securely storing and accessing documents and records from multiple sources. Retention is the life of the patient plus several years. Comparison of archived records with current results is ongoing throughout the life of the patient


HP StorageWorks 2000i G2 Modular Smart Array – Overview & Features

Samstag, April 30th, 2011

hewlettpackard_logo.jpg   The HP StorageWorks 2000i G2 Modular Smart Array selection of SAN devices features the very latest in efficient consolidation, functionality and technology at very affordable prices. The MSA2000i G2 features a 1 Gb Ethernet (1 GbE) iSCSI connected array. It allows customers to grow their storage as demands increase up to 29.7 TB SAS or 60 TB SATA, supporting up to 32 hosts for iSCSI attach


KiTTY 0.60 – Free and Portable SSH/Telnet Client for Windows

Sonntag, Juni 6th, 2010

putty_logo.jpg   KiTTY is a fork of the original PuTTY software with loads of new features including a portable version that saves all of your sessions and settings into an INI file in the same folder


Expect – a program to control interactive applications

Montag, März 29th, 2010

Expect is a great tool in a system administrators arsenal and can be used to easily automate tasks that require periodic user input. This can allow the administrator to make better use of their time than watching the application or utility to spot the next time it requires input



Esker SmarTerm 2009 – Software für die Terminalemulation

Dienstag, November 10th, 2009

esker_logo.jpg   Die Terminalemulation SmarTerm 2009 bietet die Hochsicherheitsfunktionen, die Ihr Unternehmen benötigt, um wichtige Hostdaten zu schützen mit SSL- und SSH-Verschlüsselung sowie SFTP und SCP für die gemeinsame Nutzung von Dateien unter Wahrung der Datensicherheit


Unix History timeline – a printed 12 meter poster

Dienstag, Juni 2nd, 2009


Oracle 10g RAC – the Database for Deploying SAP Applications

Dienstag, Februar 24th, 2009

oracleforsap_logo.jpg   Oracle’s Real Application Cluster database architecture for SAP Applications is a new shared cache architecture that overcomes the limitations of traditional shared nothing and shared disk approaches to provide highly scalable and available database systems for SAP customers


Ingres Database 9.2 – Incremental Rollforwarddb

Dienstag, Februar 10th, 2009

ingres_logo.jpg   The incremental rollforwarddb feature allows the journals from a database to be incrementally applied, as they are generated, to a backup copy of the database. This feature can be used to minimize downtime in the event that the backup database is needed for disaster recovery

Start the incremental rollforwarddb by issuing the following command
# rollforwarddb dbname +c -j -incremental

Issue one or more of the following commands to cause rollforwarddb to discover new journals and apply them
# rollforwarddb dbname -c +j -norollback

The database remains inconsistent and readonly

Discover and apply new journals by issuing the following command
# rollforwarddb dbname -c +j -rollback 

The incremental rollforwarddb ends, and the database is marked consistent and updateable

Ingres Database 9.2 – offered with ease of use enhancements

Dienstag, Februar 10th, 2009

ingres_logo.jpg  New Features in Ingres Database 9.2 continue to reduce the time, complexity, and database administrators (DBA) requirements by eliminating, simplifying and automating many tasks traditionally associated with maintaining an business-class database. Upgrading from previous releases of Ingres Database is a simple, highly automated task         


Documentation for the new Ingres database releasese