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Fix Shell Script “Permission Denied” Error
Make scripts executable and fix Windows line endings.
shaikmfaruk@gmail.com
Add User to Sudoers Safely
Grant sudo using visudo or wheel group without breaking sudoers.
Fix “Device is Busy” Error when Unmounting
Use lsof/fuser to find processes and safely unmount.
Check Which Process Is Using a Port
Find process blocking ports using ss, netstat, or lsof.
How to Mount an ISO File in Linux
Mount ISO images on loop device and access contents.
Fix: Cannot find a valid baseurl in yum/dnf
Resolve broken repo URL, DNS, or network issues for yum/dnf.
Reset Forgotten Root Password (rd.break method)
Use GRUB rd.break to reset the root password safely.
Extend LVM Partition Without Downtime (Adding New Disk / PV)
Add PV, extend VG and LV and grow filesystem online.
Fix Slow SSH Login (GSSAPI Authentication Delay)
SSH login pauses due to GSSAPI/Kerberos authentication.