Linux related useful links

 1. Linux Main / Core

    Linux Kernel — Main
    https://www.kernel.org/

    Linux Kernel Documentation
    https://docs.kernel.org/ 

    Linux Kernel Source Code
    https://git.kernel.org/

    Linux Kernel Archives
    https://www.kernel.org/pub/linux/

    Linux Man Pages
    https://man7.org/linux/man-pages/

    Linux Foundation
    https://www.linuxfoundation.org/

    Linux Foundation Training
    https://training.linuxfoundation.org/

    Linux Documentation Project
    https://tldp.org/

    Linux.org
    https://www.linux.org/

    Linux Hardware Compatibility
    https://linux-hardware.org/

2. Red Hat Enterprise Linux — RHEL

Enterprise Linux administration ke liye RHEL sabse important sections mein se ek hai.

    Red Hat Main
    https://www.redhat.com/

    Red Hat Enterprise Linux
    https://www.redhat.com/en/technologies/linux-platforms/enterprise-linux

    RHEL Customer Portal
    https://access.redhat.com/

    RHEL Product Page
    https://access.redhat.com/products/red-hat-enterprise-linux/ 

    RHEL Documentation
    https://docs.redhat.com/

    RHEL Knowledgebase
    https://access.redhat.com/solutions/

    RHEL Downloads
    https://access.redhat.com/downloads/

    RHEL Errata
    https://access.redhat.com/errata/

    RHEL Security Advisories
    https://access.redhat.com/security/security-updates/

    RHEL Lifecycle
    https://access.redhat.com/support/policy/updates/errata/

    Red Hat Customer Portal Labs
    https://access.redhat.com/labs/

    Red Hat Developer
    https://developers.redhat.com/

    Red Hat Training
    https://www.redhat.com/en/services/training-and-certification

    Red Hat Certification
    https://www.redhat.com/en/services/certification

    Red Hat Ansible Automation Platform
    https://www.redhat.com/en/technologies/management/ansible

Current RHEL documentation mein installation, upgrade, system administration, security, networking aur System Roles jaise topics directly available hain.

3. Ubuntu Server

    Ubuntu Main
    https://ubuntu.com/

    Ubuntu Server
    https://ubuntu.com/server

    Ubuntu Documentation
    https://docs.ubuntu.com/ 

    Ubuntu Server Documentation
    https://documentation.ubuntu.com/server/

    Ubuntu Desktop
    https://ubuntu.com/desktop

    Ubuntu Core
    https://ubuntu.com/core

    Ubuntu Cloud
    https://ubuntu.com/cloud

    Ubuntu Packages
    https://packages.ubuntu.com/

    Ubuntu Security
    https://ubuntu.com/security

    Ubuntu Security Notices
    https://ubuntu.com/security/notices

    Ubuntu Pro
    https://ubuntu.com/pro

    Ubuntu Advantage / Enterprise
    https://ubuntu.com/support

    Ubuntu Downloads
    https://ubuntu.com/download

    Ubuntu Releases
    https://releases.ubuntu.com/

    Ubuntu Launchpad
    https://launchpad.net/

    Ubuntu Ask
    https://askubuntu.com/

    Ubuntu Forums
    https://discourse.ubuntu.com/

Ubuntu ki current documentation directory mein Server ke saath Kernel, cloud, containers/VMs, Kubernetes, MAAS, Juju, Landscape aur security-related resources bhi available hain.

4. Debian

    Debian Main
    https://www.debian.org/

    Debian Documentation
    https://www.debian.org/doc/

    Debian Administrator's Handbook
    https://debian-handbook.info/

    Debian Packages
    https://packages.debian.org/

    Debian Security
    https://www.debian.org/security/

    Debian Security Tracker
    https://security-tracker.debian.org/

    Debian Wiki
    https://wiki.debian.org/

    Debian Installation Guide
    https://www.debian.org/releases/stable/installmanual

    Debian Release Information
    https://www.debian.org/releases/

    Debian Bug Tracking System
    https://bugs.debian.org/

    Debian Mailing Lists
    https://lists.debian.org/

5. SUSE Linux Enterprise — SLES

    SUSE Main
    https://www.suse.com/

    SUSE Linux Enterprise
    https://www.suse.com/products/server/

    SLES Documentation
    https://documentation.suse.com/

    SUSE Customer Center
    https://scc.suse.com/

    SUSE Downloads
    https://www.suse.com/download/

    SUSE Support
    https://www.suse.com/support/

    SUSE Knowledgebase
    https://www.suse.com/support/kb/

    SUSE Linux Enterprise Server Documentation
    https://documentation.suse.com/sles/

    SUSE Manager
    https://www.suse.com/products/suse-manager/

    SUSE Rancher
    https://www.rancher.com/

    openSUSE
    https://www.opensuse.org/

    openSUSE Documentation
    https://doc.opensuse.org/

6. Rocky Linux

    Rocky Linux Main
    https://rockylinux.org/

    Rocky Linux Downloads
    https://rockylinux.org/download

    Rocky Linux Documentation
    https://docs.rockylinux.org/

    Rocky Linux Wiki
    https://wiki.rockylinux.org/

    Rocky Linux Forum
    https://forums.rockylinux.org/

    Rocky Linux GitHub
    https://github.com/rocky-linux

    Rocky Linux Errata
    https://errata.rockylinux.org/

7. AlmaLinux

    AlmaLinux Main
    https://almalinux.org/

    AlmaLinux Downloads
    https://almalinux.org/get-almalinux/

    AlmaLinux Documentation
    https://wiki.almalinux.org/

    AlmaLinux Wiki
    https://wiki.almalinux.org/

    AlmaLinux Errata
    https://errata.almalinux.org/

    AlmaLinux Security
    https://almalinux.org/security/

    AlmaLinux Forum
    https://forums.almalinux.org/

8. Oracle Linux

    Oracle Linux Main
    https://www.oracle.com/linux/

    Oracle Linux Documentation
    https://docs.oracle.com/en/operating-systems/oracle-linux/ 

    Oracle Linux 10 Documentation
    https://docs.oracle.com/en/operating-systems/oracle-linux/10/

    Oracle Linux 9 Documentation
    https://docs.oracle.com/en/operating-systems/oracle-linux/9/

    Oracle Linux 8 Documentation
    https://docs.oracle.com/en/operating-systems/oracle-linux/8/

    Oracle Linux Downloads
    https://yum.oracle.com/oracle-linux-isos.html

    Oracle Linux Yum Server
    https://yum.oracle.com/

    Oracle Linux Support
    https://www.oracle.com/support/

    Oracle Linux Training
    https://www.oracle.com/education/training/

    Oracle Linux Virtualization Manager
    https://www.oracle.com/virtualization/virtualization-manager/

    Oracle Linux Ksplice
    https://www.oracle.com/linux/ksplice/

Oracle ke current Linux documentation mein Oracle Linux 10/9/8 ke saath UEK, Ksplice, virtualization, cloud-native aur OS management resources bhi available hain.

9. CentOS / Legacy

    CentOS Stream
    https://www.centos.org/stream/

    CentOS Main
    https://www.centos.org/

    CentOS Documentation
    https://docs.centos.org/

    CentOS Wiki
    https://wiki.centos.org/

    CentOS Vault
    https://vault.centos.org/

    CentOS SIGs
    https://www.centos.org/stream/

    CentOS GitHub
    https://github.com/CentOS

10. Linux Package Management

    RPM
    https://rpm.org/

    RPM Documentation
    https://rpm.org/documentation.html

    DNF Documentation
    https://dnf.readthedocs.io/

    YUM Documentation
    https://access.redhat.com/documentation/

    APT Documentation
    https://manpages.debian.org/apt/

    Ubuntu Packages
    https://packages.ubuntu.com/

    Debian Packages
    https://packages.debian.org/

    Snap
    https://snapcraft.io/

    Snapcraft
    https://snapcraft.io/docs

    Flatpak
    https://flatpak.org/

11. systemd

    systemd Main
    https://systemd.io/

    systemd Documentation
    https://www.freedesktop.org/wiki/Software/systemd/

    systemd Man Pages
    https://www.freedesktop.org/software/systemd/man/

    systemctl Documentation
    https://www.freedesktop.org/software/systemd/man/latest/systemctl.html

    journalctl Documentation
    https://www.freedesktop.org/software/systemd/man/latest/journalctl.html

    systemd Boot
    https://systemd.io/BOOT_LOADER_SPECIFICATION/

12. Linux Networking

    Linux Networking Documentation
    https://docs.kernel.org/networking/

    NetworkManager
    https://networkmanager.dev/

    NetworkManager Documentation
    https://networkmanager.dev/docs/

    iproute2
    https://www.kernel.org/pub/linux/utils/net/iproute2/

    Linux net-tools
    https://sourceforge.net/projects/net-tools/

    Netfilter
    https://www.netfilter.org/

    iptables
    https://www.netfilter.org/projects/iptables/

    nftables
    https://www.nftables.org/

    nftables Wiki
    https://wiki.nftables.org/

    Linux TCP/IP Documentation
    https://docs.kernel.org/networking/

    OpenSSH
    https://www.openssh.com/

    OpenSSH Manual
    https://man.openbsd.org/ssh

    ISC DHCP
    https://www.isc.org/dhcp/

13. Linux Storage / Disk / Filesystem

Ye section Server + Storage background ke liye particularly important hai.

    Linux Storage Documentation
    https://docs.kernel.org/admin-guide/mm/

    Linux Block Layer
    https://docs.kernel.org/block/

    Linux SCSI Subsystem
    https://docs.kernel.org/scsi/

    Linux NVMe
    https://docs.kernel.org/nvme/

    Linux Device Mapper
    https://docs.kernel.org/admin-guide/device-mapper/

    LVM2
    https://sourceware.org/lvm2/

    LVM Documentation
    https://docs.redhat.com/

    mdadm / Linux Software RAID
    https://www.kernel.org/pub/linux/utils/raid/mdadm/

    Linux RAID Wiki
    https://raid.wiki.kernel.org/

    XFS
    https://xfs.org/

    XFS Documentation
    https://docs.kernel.org/filesystems/xfs/

    ext4 Documentation
    https://docs.kernel.org/filesystems/ext4/

    Btrfs
    https://btrfs.readthedocs.io/

    Btrfs Main
    https://btrfs.org/

    NFS
    https://docs.kernel.org/filesystems/nfs/

    Samba
    https://www.samba.org/

    Samba Documentation
    https://www.samba.org/samba/docs/

14. Multipath / SAN — Linux

Agar tu Brocade + Dell EMC + HPE Storage + Linux environment ke liye padh raha hai, ye bahut important hai.

    Device Mapper Multipath
    https://docs.redhat.com/

    DM-Multipath Documentation
    https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/

    Linux SCSI
    https://docs.kernel.org/scsi/

    Linux Fibre Channel Documentation
    https://docs.kernel.org/scsi/

    Linux FC HBA Documentation
    https://docs.kernel.org/scsi/

    Linux NVMe-oF
    https://docs.kernel.org/nvme/

    Open-iSCSI
    https://github.com/open-iscsi/open-iscsi

    iSCSI Documentation
    https://docs.redhat.com/

    targetcli
    https://github.com/open-iscsi/targetcli-fb

15. Linux Security

    SELinux Main
    https://selinuxproject.org/

    SELinux Documentation
    https://docs.redhat.com/

    SELinux Wiki
    https://github.com/SELinuxProject

    AppArmor
    https://apparmor.net/

    AppArmor Documentation
    https://documentation.ubuntu.com/security/

    Linux Audit / Auditd
    https://github.com/linux-audit/audit-userspace

    Linux PAM
    https://www.linux-pam.org/

    OpenSCAP
    https://www.open-scap.org/

    OpenSCAP Documentation
    https://www.open-scap.org/resources/documentation/

    CIS Benchmarks
    https://www.cisecurity.org/cis-benchmarks

16. Linux Performance Monitoring

    procps-ng
    https://gitlab.com/procps-ng/procps

    sysstat
    https://github.com/sysstat/sysstat

    iostat
    https://man7.org/linux/man-pages/man1/iostat.1.html

    sar
    https://man7.org/linux/man-pages/man1/sar.1.html

    vmstat
    https://man7.org/linux/man-pages/man8/vmstat.8.html

    top
    https://man7.org/linux/man-pages/man1/top.1.html

    ps
    https://man7.org/linux/man-pages/man1/ps.1.html

    lsof
    https://man7.org/linux/man-pages/man8/lsof.8.html

    strace
    https://strace.io/

    perf
    https://perf.wiki.kernel.org/

    Linux perf Documentation
    https://docs.kernel.org/tooling/perf/

17. Ansible / Automation

    Ansible Main
    https://www.ansible.com/

    Ansible Documentation
    https://docs.ansible.com/

    Ansible Community
    https://forum.ansible.com/

    Ansible Galaxy
    https://galaxy.ansible.com/

    Ansible GitHub
    https://github.com/ansible/ansible

    Red Hat Ansible Automation Platform
    https://www.redhat.com/en/technologies/management/ansible

    Ansible Playbooks
    https://docs.ansible.com/ansible/latest/playbook_guide/

    Ansible Modules
    https://docs.ansible.com/ansible/latest/collections/

18. Containers / Docker

    Docker Main
    https://www.docker.com/

    Docker Documentation
    https://docs.docker.com/

    Docker Hub
    https://hub.docker.com/

    Docker Compose
    https://docs.docker.com/compose/

    Podman
    https://podman.io/

    Podman Documentation
    https://docs.podman.io/

    Buildah
    https://buildah.io/

    containerd
    https://containerd.io/

    OCI
    https://opencontainers.org/

19. Kubernetes

    Kubernetes Main
    https://kubernetes.io/

    Kubernetes Documentation
    https://kubernetes.io/docs/

    Kubernetes Concepts
    https://kubernetes.io/docs/concepts/

    Kubernetes Administration
    https://kubernetes.io/docs/tasks/administer-cluster/

    kubectl Documentation
    https://kubernetes.io/docs/reference/kubectl/

    Kubernetes Networking
    https://kubernetes.io/docs/concepts/cluster-administration/networking/

    Kubernetes Storage
    https://kubernetes.io/docs/concepts/storage/

    Kubernetes CSI
    https://kubernetes-csi.github.io/docs/

20. Virtualization

    KVM
    https://www.linux-kvm.org/

    KVM Documentation
    https://docs.kernel.org/

    QEMU
    https://www.qemu.org/

    QEMU Documentation
    https://www.qemu.org/docs/master/

    libvirt
    https://libvirt.org/

    libvirt Documentation
    https://libvirt.org/docs.html

    oVirt
    https://www.ovirt.org/

    Proxmox VE
    https://www.proxmox.com/en/proxmox-virtual-environment

    Proxmox Documentation
    https://pve.proxmox.com/pve-docs/

21. Bash / Shell Scripting

    GNU Bash
    https://www.gnu.org/software/bash/

    Bash Reference Manual
    https://www.gnu.org/software/bash/manual/

    GNU Coreutils
    https://www.gnu.org/software/coreutils/

    GNU Coreutils Manual
    https://www.gnu.org/software/coreutils/manual/

    GNU Awk
    https://www.gnu.org/software/gawk/

    GNU sed
    https://www.gnu.org/software/sed/

    GNU grep
    https://www.gnu.org/software/grep/

    GNU findutils
    https://www.gnu.org/software/findutils/

    GNU tar
    https://www.gnu.org/software/tar/

22. Git / Linux Development

    Git Main
    https://git-scm.com/

    Git Documentation
    https://git-scm.com/doc

    Git Book
    https://git-scm.com/book/en/v2

    GitHub
    https://github.com/

    GitLab
    https://gitlab.com/

23. Linux Logging / Monitoring

    rsyslog
    https://www.rsyslog.com/

    rsyslog Documentation
    https://www.rsyslog.com/doc/

    syslog-ng
    https://www.syslog-ng.com/

    Prometheus
    https://prometheus.io/

    Prometheus Documentation
    https://prometheus.io/docs/

    Grafana
    https://grafana.com/

    Grafana Documentation
    https://grafana.com/docs/

    Nagios
    https://www.nagios.org/

    Zabbix
    https://www.zabbix.com/

    Zabbix Documentation
    https://www.zabbix.com/documentation/

24. Linux Cloud

    AWS Linux
    https://aws.amazon.com/linux/

    Amazon Linux Documentation
    https://docs.aws.amazon.com/linux/

    Azure Linux
    https://learn.microsoft.com/en-us/azure/azure-linux/

    Google Cloud Linux VMs
    https://cloud.google.com/compute/docs/images

    Oracle Linux on OCI
    https://www.oracle.com/cloud/compute/

    Ubuntu on AWS
    https://ubuntu.com/aws

    Ubuntu on Azure
    https://ubuntu.com/azure

    Ubuntu on Google Cloud
    https://ubuntu.com/google-cloud

25. Linux Troubleshooting / Reference

    Linux man7
    https://man7.org/

    Linux man-pages Project
    https://www.kernel.org/doc/man-pages/

    Linux Kernel Documentation
    https://docs.kernel.org/

    Red Hat Knowledgebase
    https://access.redhat.com/solutions/

    Ubuntu Documentation
    https://documentation.ubuntu.com/

    SUSE Documentation
    https://documentation.suse.com/

    Oracle Linux Documentation
    https://docs.oracle.com/en/operating-systems/oracle-linux/

⭐ Linux Server Admin ke liye MUST BOOKMARK

Agar tera focus Linux System Administrator / L2-L3 Linux / Storage + Linux / Data Center hai, toh sabse pehle ye bookmark kar:

    https://docs.kernel.org/
    https://man7.org/linux/man-pages/
    https://access.redhat.com/
    https://docs.redhat.com/
    https://ubuntu.com/server
    https://documentation.ubuntu.com/server/
    https://documentation.suse.com/
    https://docs.oracle.com/en/operating-systems/oracle-linux/
    https://rockylinux.org/
    https://docs.rockylinux.org/
    https://almalinux.org/
    https://www.debian.org/doc/
    https://www.freedesktop.org/software/systemd/man/
    https://networkmanager.dev/docs/
    https://docs.kernel.org/scsi/
    https://sourceware.org/lvm2/
    https://docs.kernel.org/filesystems/xfs/
    https://docs.kernel.org/nvme/
    https://www.samba.org/samba/docs/
    https://www.openssh.com/
    https://www.ansible.com/
    https://docs.ansible.com/
    https://docs.docker.com/
    https://kubernetes.io/docs/
    https://prometheus.io/docs/

🔥 Tere Server + Storage background ke hisaab se Linux mein ye sequence best rahega

Linux basics → RHEL → Ubuntu → systemd → users/groups → permissions → filesystem → LVM → RAID → SCSI → FC → iSCSI → multipath → NFS → Samba → networking → DNS → DHCP → SSH → firewalld/iptables/nftables → SELinux → performance → logs → troubleshooting → Bash → Ansible → virtualization → containers → Kubernetes.

Linux kernel ki official documentation mein administration, userspace tools, storage-related subsystems, networking, drivers aur architecture-specific material available hai, isliye https://docs.kernel.org/ ko primary technical reference rakhna useful hai.