RAID:
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RAID is a technology that is used to increase the performance and/or reliability of data storage. The abbreviation stands for either Redundant Array of Inexpensive Disks or Redundant Array of Independent Drives. A RAID system consists of two or more drives working in parallel. These can be hard discs, but there is a trend to also use the technology for SSD (Solid State Drives). There are dierent RAID levels, each optimized for a specic
situation. These are not standardized by an industry group or standardization committee. This explains why companies sometimes come up with their own unique numbers and implementations. This article covers the following RAID levels:
RAID 0 - striping
RAID 1 - mirroring
RAID 5 - striping with parity
RAID 6 - striping with double parity
RAID 10 - combining mirroring and striping
What about RAID levels 2, 3, 4 and 7?
These levels do exist but are not that common (RAID 3 is essentially like RAID 5 but with the parity data always written to the same drive). This is just a simple introduction to RAID systems.
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Complete RHEL 8 Training Course (RHCSA+RHCE) Contents:
1) Linux history
2) Installation of RHEL 8 in EC2 (AWS) Or VMWare
3) Filesystem hierarchy
4) Getting help & man Pages
5) Working with directories
6) Working with files
7) working with file contents
8) Shell expansion: Command & Arguments
9) Shell expansion: Control Operators
10) Shell expansion: Shell variables
11) Shell expansion: Shell Embedding & Options
12) Shell expansion: Shell History
13) Shell expansion: File Globing
14) Pipes & Commands: I/O Redirection
15) Pipes & Commands: Filters
16) Basic Unix Tools
17) Regular expressions
18) VI Editor
19) User, Password & Group Management
20) Standard file permissions
21) Advanced file permissions
22) Access control lists
23) File links
24) Process Management: introduction, process priorities & background jobs
25) Disk Management: Disk Devices, Partitions, Filesystems, Mounting, UUID, RAID, LVM, iSCSI, etc.
26) Boot Management: RHEL 8 Boot Process, Bootloader, Systemd & Targets
27) Future Task Scheduling: at & crontab
28) System Logging Management
29) Memory Management
30) Resource Monitoring & Management
31) Package Creation & Management: rpmbuildup, RPM, YUM & DNF
32) Network Management: interface configuration, Configure dynamic and static network settings for IPv4/IPV6 and filter packets, routing table, SSH, NFS etc.
33) Kernel Management: About Linux Kernel, Library Management, Parameter Tuning & Kernel Compilation.
34) Backup Management
35) System Services and Security: Configure and manage system logging, time synchronization, printers, and task automation.
36) Server Security: Firewall & SELinux.
37) Basic Shell Scripting
38) Server Configuration: SSH, Telnet, FTP, NFS, CIFS/SMB, DNS, DHCP, NTP (Chrony), MySQL, MariaDB, Oracle, Puppet, Docker, Ansible, LDAP, NIS, iSCSI Target/Initiator, Jenkins, Web Servers HTTP/HTTPS, Nginx, Zabbix, NagiOS, YUM servers, Postfix, Sendmail, Dovecot, Squirrel Mail etc.
39) Reset Forgotten Root Password & Grub Password
40) Kickstart Installation of RHEL 7
41) Swap Space Management
42) High Availability Cluster Server
43) Virtualization in RHEL 8: XEN & KVM
44) RHEL Subscription Management
45) Upgrading from RHEL 7 to RHEL 8
46) Multifactor Authentication in RHEL 8
47) SSH Port Forwarding
48) Rescue System: Repair InitRAMFS
49) RHEL 8 New Features: Startis Filesystem, Cockpit Web Console, Lorex Composer Runtime, Podman Containers, Firewalld (NFTables), Chronyd (NTP), DNF & Much More.
50) Complete EC2 Module of AWS
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