Enabling su/sudo Access with Wheel Group
About this Hands-on Lab System Administrators rarely log into a system as `root`, due to a number of security risks. Some distributions even disable the `root` account to begin with…..
Read moreHow to identify the HBA cards/ports and WWN in Linux
Method 1 install packages pciutils atau sysfsutils. # yum install pciutils To find the HBA cards installed on your system use : # lspci -nn | grep -i hba 07:00.0….
Read moreFixing Duplicate Packages When Upgrading Process RedHat
This is the way I did fix one CentOS/RedHat 7 server with 471 dupes. First I had to install yum utils: yum install yum-utils Have tried yum-complete-transaction and other stuff….
Read moreError – rpmdb open failed
[root@idcbprhoswrk004 data]# yum clean all error: db5 error(5) from dbenv->open: Input/output error error: cannot open Packages index using db5 – Input/output error (5) error: cannot open Packages database in /var/lib/rpm….
Read moreRepair Human Error Change Owner Filesystem Linux
Enter to Rescue Mode. Resetup Owner File and Directory Redhat rpm –setperms -a Resetup User Group File and Directory rpm –setugids -a Resetup Owner Filesystem Linux rpm –setperms filesystem
Read moreRemoving a Swap File
Disable a swapfile : #swapoff -v /swapfile Remove the swapfile on filesystem #rm /swapfile
Read moreCentOS / RHEL 7 : How to boot into Rescue Mode or Emergency Mode
The post explains how to bootup RHEL 7 system into rescue mode or emergency mode. In RHEL7, both rescue mode and emergency mode are systemd targets which replaced the concept….
Read moreCreate User Linux Sudoers Specific Privilages
/etc/sudoers Syntax Following is general syntax used by /etc/sudoers file: USER HOSTNAME=COMMAND Where, USER: Name of normal user HOSTNAME: Where command is allowed to run. It is the hostname of….
Read moreLVM-Thin Problem – always xfs_repair to up Operating System
What problem/issue/behavior are you having trouble with? What do you expect to see? – can you give the solution for this ? – any related this issue with lvm-thin provisioning….
Read moreSearch Big File and HouseKeeping Log Linux
Search File With Size =============================== find / -type f -size +200000k -exec ls -lh {} \; | awk ‘{ printf $9 “: ” $5 }’ find / -type f -size….
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