Linux and Unix, Open Source, Linux Howtos
xfs_repair command repairs corrupt or damaged XFS filesystems. It’s highly scalable, high-performance and is designed to effectively repair even very large file systems with many inodes. Unlike other Linux file …
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By default, the sendmail runs locally on localhost.localdomain and tries to send the mail with the [email protected] to the remote smtp server, which would get rejected as the localhost.localdomain will …
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Most companies scan infrastructure devices for vulnerability every quarter, but the duration may vary depending on the company’s ITSM policy. After the security scan, if the security team finds vulnerabilities …
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Sometimes the Linux system crashes due to corruption of the root filesystem, in which case you need to boot the system into recovery mode and then repair your file system. …
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You may need to reinstall the GRUB 2 boot loader when the system does not boot into the GRUB menu. This may be due to the installation of security patches …
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As the name implies, rescue mode is provided to rescue your system when the system unable to boot normally into Red Hat Enterprise Linux with runlevel 3 or 5. You …
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This article explains how to bootup RHEL/CentOS 7 and 8 system into emergency mode through systemd emergency target unit. There are situations where you need to boot Red Hat 8/7 …
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This article describes how to bootup RHEL/CentOS 8 system into rescue mode using the systemd rescue target unit. You may need to boot your RHEL 7/8 and CentOS 7/8 system …
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When things go wrong on the Linux system, it allows the user to repair the system by booting into a different troubleshooting mode, such as recovery mode, single user mode, …
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If the existing root password is no longer memorize or is forgotten, you can recover the forgotten root password on boot by switching into single user mode. This guide describes …
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