What I am offering for Linux Systems -
- Boot and Filesystem Issues (Kernel, GRUB, bootloader, Filesystem corruption)
- Networking issues (DNS, interface, firewall, iptables, routing, SSH)
- Storage and Disk issues (LVM, Disk I/O-iops, Mount permission, Ceph, ZFS)
- Package and dependency issues
- Permissions and Security issues (apparmor, SELinux, Sudo, PAM)
- System Resource and Performance Bottleneck checking
- Virtualization and KVM
- Log rotation and Backup issues