Configuration guides for IT Administrators
Linux
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Configure rsyslog in Linux
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Read More →: Configure rsyslog in Linux1. Install rsyslog (if not already installed) 2. Edit rsyslog Configuration Uncomment or add the following line to enable UDP reception: 3. Open Firewall Port (UDP 514) This saves the rules to /etc/sysconfig/iptables, if you receive error, install iptables-services 4. Restart services By default, rsyslog on Oracle Linux (and most RHEL-based systems) writes system log…
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Manage User Accounts and Privileges in Ubuntu
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Read More →: Manage User Accounts and Privileges in Ubuntu1. List all users in Ubuntu cut -d: -f1 /etc/passwd Explanation: cut : command-line utility that extracts sections from lines of a file or input -d: : delimiter as a colon (:) to separate fields -f1 : tells cut to extract field 1, which is username /etc/passwd : contains all user account information 2. Create new…
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Setup parsedmarc in Ubuntu
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Read More →: Setup parsedmarc in UbuntuStep 1: Install Maxmind Step 2: Prerequisite Step 3: Create system user Step 4: Install parsedmarc in a virtual directory Note: Ignore the installation error thrown for having incompatible version of urllib. Step 5: Configure parsedmarc.ini file [general] save_aggregate = True save_forensic = True [msgraph] auth_method = ClientSecret client_id = client_secret = tenant_id = mailbox…
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Commands to identify and manage large Linux files
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Read More →: Commands to identify and manage large Linux filesLinux command to list large files in a folder Linux command to truncate size of large files Replace with the desired size in bytes, kilobytes (K), megabytes (M), gigabytes (G), or terabytes (T), and with the name of the file you want to truncate. Example:truncate -s 800MB /var/log/user.log Note that this command will permanently delete…
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apt-get update failed because certificate verification
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Read More →: apt-get update failed because certificate verificationUbuntu apt-get update shows Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake:
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Add AD Group account to sudoers in Ubuntu
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Read More →: Add AD Group account to sudoers in UbuntuAdd %ADgroup ALL=(ALL) ALL to sudoers file to provide sudo privilege to AD group
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Update Date, Time, Timezone on Ubuntu
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Read More →: Update Date, Time, Timezone on UbuntuUse timedatectl command to view and change time, date and timezone in Ubuntu
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Expand Ubuntu disk after adding additional disk space in Hyper-V
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Read More →: Expand Ubuntu disk after adding additional disk space in Hyper-VQuick and easy steps to expand Ubuntu disk space
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Fixing missing network interface card in cloned Linux VM
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Read More →: Fixing missing network interface card in cloned Linux VMCloned Linux VM reports missing network interface card because of mismatch MAC address in cloned VM and the one assigned by VMware.
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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