What is cpio archive and how to extract and create cpio ?
It is a common question what do you mean by cpio archive and what is its use when we have gzip/xz, etc compressions already in place. And how to create...
Month: December 2017
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How to find all failed SSH login attempts in NGE Linux ?
Linux keeps tracks of all failed login attempts and this can be viewed by analyzing the /var/log/secure file. NGELinux, Centos,Redhat: # egrep "Fail(ed|ure)" /var/log/secure An example can be seen as...
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A script to collect snoop/tcpdump on Linux/Solaris Servers in case of segmentation fault ?
We faced a strange issue where a segmentation fault occurs randomly on server and there are no logs captured on server to analyze the issue. In this situation, we got...
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Linux: Warning : /dev/root/ does not exist ?
Sometimes we receive issues with PXE boot server with below text: dracut-initqueue: /dev/root does not exist The issue is caused while downloading or reading the squashfs filesystem. To correct this...
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A script to mount available CD/DVD Drive on system boot automatically ?
Now we will look how to mount a CD/DVD rom drive on Linux/Unix drive automatically on system reboot. We can use the below command/script in /etc/profile or /etc/rc.sysinit or similar...
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How to pass variables and arrays into function in C ?
Generally there are two ways of passing values in a function: 1. Call by Value 2. Call by Reference Call by Value: In call by value a copy of actual...
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How to pause a running processes and resume after some time in Linux or Unix ?
Today we will check how to pause a running task on linux so that we can resume it after some time. Suppose you ran a task to download multiple packages,...
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How to re-install a RPM Package using rpm and yum of same version ?
Sometimes we change some file of a rpm package and want to rollback the changes by re-installing the RPM package. However if you do rpm -Uvh or yum install/update, it...
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How to mount a cdrom drive in Linux permanently ?
Its common question or requirement on a Linux system, how to mount a CD ROM drive ? 1. We can simply mount the drive on any mount point. [root@nglinux nglinux...
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Mounting HGFS shares: [FAILED] error on booting Linux on VM ?
Sometimes you can see below error message while booting your Linux system on VMware and not able to mount your HGFS share. Mounting HGFS shares: [FAILED] You can try restarting...