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September 8, 2023 Linux

How to extend the size of the physical volume (PV) in Linux

Problem How to extend the size of the physical volume (PV) in Linux if disk space is available? It is required to avoid the creation of a new physical volume for increasing the size of the volume group. # df -HT Filesystem Type Size Used Avail …

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September 8, 2023 Linux

How to get a list of enabled entries in Linux hosts file

Problem How to get a list of enabled entries in Linux hosts file? Sometimes, as system administrators, you need to check the list of enabled entries in a Linux system’s /etc/hosts file. Generally, we check the list of enabled host entries by checking the /etc/hosts file …

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April 30, 2022 HP-UX

How to clone an HP-UX system image using Dynamic Root Disk (DRD)

In IT Data Centers backup is a very important task. As a system administrator, you need to take and keep a backup of codes, important files, logs, image backups of OS etc. For HP-UX operating systems, HPE provides an HP-UX system administration toolset called Dynamic Root …

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August 12, 2021 Microsoft Windows

How to find the Uptime of a Windows Computer

Uptime of a computer provides the information that how long your computer has been up and running. There are several ways to find the uptime of a windows computer. Here I am showing the two ways through which you can find the uptime of your windows …

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July 16, 2021 Linux

Disable SSH Weak Algorithms Supported in Linux

NESSUS tool found below vulnerability on the scan of a Linux server. 90317 – SSH Weak Algorithms Supported Synopsis The remote SSH server is configured to allow weak encryption algorithms or no algorithm at all. Description Nessus has detected that the remote SSH server is …

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July 15, 2021 Linux

Disable SSH Server Weak and CBC Mode Ciphers in Linux

NESSUS tool found below vulnerability in a Linux server. 70658 – SSH Server Weak and CBC Mode Ciphers Enabled Synopsis The SSH server is configured to use Cipher Block Chaining. Description The SSH server is configured to support Cipher Block Chaining (CBC) encryption. This may …

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July 14, 2021 Linux

Disable SSH Weak MAC Algorithms in Linux

NESSUS tool found below vulnerability in a Linux server. 71049 – SSH Weak MAC Algorithms Enabled Synopsis The remote SSH server is configured to allow MD5 and 96-bit MAC algorithms. Description The remote SSH server is configured to allow either MD5 or 96-bit MAC algorithms, …

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July 13, 2021 Linux

Network Time Protocol Daemon (ntpd) monlist Command Enabled DoS

NESSUS tool found below vulnerability on the scan of a Linux NTP server. 71783 – Network Time Protocol Daemon (ntpd) monlist Command Enabled DoS Synopsis The remote NTP server is affected by a denial of service vulnerability. Description The version of ntpd running on the …

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July 11, 2021 HP-UX

Disable SSH Protocol Version 1 Session Key Retrieval

NESSUS scan showing the below vulnerability on one of the HP-UX server. 10882 – SSH Protocol Version 1 Session Key Retrieval Synopsis The remote service offers an insecure cryptographic protocol. Description The remote SSH daemon supports connections made using the version 1.33 and/or 1.5 …

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July 10, 2021 Web Servers, Linux

Disable SSL Medium Strength Cipher Suites

NESSUS tool found below vulnerability on the scan of a server. 42873 – SSL Medium Strength Cipher Suites Supported Synopsis The remote service supports the use of medium strength SSL ciphers. Description The remote host supports the use of SSL ciphers that offer medium strength …

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Tag: Sys Admin