Configuration guides for IT Administrators
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IPTables Commands
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Read More →: IPTables CommandsUseful commands to allow port in iptables, delete port in iptables, save iptables permanently.
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Grant Mailbox Access Permission to Microsoft365 Mailbox
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Read More →: Grant Mailbox Access Permission to Microsoft365 MailboxTo grant full access to an Microsoft 365 Mailbox you must first connect to the remote PowerShell, and provide MailboxPermission.
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PowerShell Connect to Exchange Online
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Read More →: PowerShell Connect to Exchange OnlineSteps to connect to Exchange Online in Microsoft 365
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PowerShell connect to Microsoft 365 AD
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Read More →: PowerShell connect to Microsoft 365 ADHow to install Microsoft 365 AD PowerShell modules, both AzureAD and Msol and how to connect to Microsoft365 PowerShell
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Difference between /sbin/nologin and /bin/false
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Read More →: Difference between /sbin/nologin and /bin/falseBoth /sbin/nologin and /bin/false are used to refuse login attempt however they differ slightly on providing customizable error message.
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Install-Module is not recognized as the name of a cmdlet, function, script file, or operable program
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Read More →: Install-Module is not recognized as the name of a cmdlet, function, script file, or operable programInstall-Module cmdlet by default, is not recognized on Windows 2012 R2 server. When running Install-Module on PowerShell, you will receive an error saying Install-Module : The term ‘Install-Module’ is not recognized as the name of a cmdlet.
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Install Docker on Ubuntu without direct internet connection
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Read More →: Install Docker on Ubuntu without direct internet connectionFollow steps to manually install Docker on air-gapped Ubuntu systems with no access to the internet.
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Containerd.io depends libseccomp2
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Read More →: Containerd.io depends libseccomp2containerd.io depends on libseccomp2 (>= 2.4.0) error is thrown while installing docker. To resolve this dependency error, build-essential and fix install.
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Zabbix Agent doesn’t start – Failed with result ‘exit-code’.
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Read More →: Zabbix Agent doesn’t start – Failed with result ‘exit-code’.We encountered problem after fresh installation of Zabbix Agent in Ubuntu. Zabbix Installation Error zabbix_agentd[4770]: zabbix_agentd [4770]: /etc/zabbix/zabbix_agentd.conf.d: [2] No suc systemd[1]: zabbix-agent.service: Control process exited, code=exited status=1 systemd[1]: zabbix-agent.service: Failed with result ‘exit-code’. systemd[1]: Failed to start Zabbix Agent. systemd[1]: zabbix-agent.service: Service hold-off time over, scheduling restart. systemd[1]: zabbix-agent.service: Scheduled restart job, restart counter…
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Fix print_req_error: I/O error, dev fd0, sector 0
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Read More →: Fix print_req_error: I/O error, dev fd0, sector 0In fresh Ubuntu installation, fix print_req_error: I/O error, dev fd0, sector 0
Lucas Brey
I’m Lucas Brey, a travel blogger sharing practical guides, hidden gems, and honest tips from the road. Follow along for smart itineraries, great food finds, and stories worth bookmarking.
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