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How to live patch Ubuntu Linux Kernel without rebooting the server

Kernel live patching enables runtime correction of critical security issues in running kernel without rebooting. How do I enable or patch my Ubuntu Linux 16.04 LTS server without rebooting the box?
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How to force users to use secure passwords on Ubuntu/Debian Linux

My Linux shell user can modify their password using the passwd command. How can I force users to choose the secure password that will prevent users from using stupid passwords like “abc123”, “password”, “123456” and so on? How do I setup password quality requirements on my Debian or Ubuntu Linux server?
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cron Error: bad username; while reading /etc/cron.d file on Linux

I am getting the following error in my cron job log file /var/log/cron.log:
       Aug 22 01:59:01 server2 cron[7510]: Error: bad username; while reading /etc/cron.d/backups
I have job entry as follows to run a job at 00:50 every day for root user:
       50 0 * * * /etc/cron.d/backups
How do I fix this problem on Linux or Unix-like system?
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Ubuntu 16.04 Create a cron.log File To Log crontab Logs

I am a new Ubuntu Linux 16.04 user. How do I verify that my cron job is executing? I am unable to find /var/log/cron.log file. Where is the cron log file on Ubuntu 16.04 LTS server?
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How to make disk image with dd on Linux or Unix

How do I create disk image using dd command? How do I perform disk cloning from a live Linux cd for backup or recovery purpose?
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How to configure a static IP address on CentOS 7 / RHEL 7

I am a new sysadmin and CentOS user. My system is configured to use DHCP. How can I switch from DHCP to static IP address configuration in a CentOS 7 desktop system? How do I setup a static TCP/IP address on my CentOS Linux 7 or Red Hat Enterprise Linux 7 server using command line option?
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How to see PCI devices info on CentOS 7 and RedHat Enterprise Linux 7

I wanted to see PCI devices information on my CentOS/RHEL 7 box. But, I’m getting an error that read as, “-bash: lspci: command not found”. How do I solve this problem and see PCI devices information on CentOS/RHEL 7?
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