Make Rhel-7 & in Graphical mode                  How To make rhel-7 as graphical desktop yum grouplist yum groups install "GNOME Desktop" or yum groupinstall "GNOME Desktop" yum groups install "Server with GUI" or yum groupinstall "Server with GUI" systemctl … Continue reading rhel-7 or centos-7
Author: mshaik
shell-scripts
Shell-Scripting: First look how to print the text using script [root@shellscripting ~]# touch one [root@shellscripting ~]# cat > one echo "Hello every one Thanks for reading" [root@shellscripting ~]# sh one Hello every one Thanks for reading [root@shellscripting ~]# bash one Hello every one Thanks for reading ----------------------------------------------------------------------------------------------------- [root@shellscripting ~]# touch second [root@shellscripting ~]# [root@shellscripting ~]# … Continue reading shell-scripts
important commands
cut,sort,uniq.sed.awk commands [root@rhel6-client1 ~]# cat cutcommand hello now we are gojng to explain cut command this is the first line of our practise seond line of our practise session third line will be this fourth line  consists of this data like this we can practise [root@rhel6-client1 ~]# cut -d " " -f1 cutcommand hello this … Continue reading important commands
monitoring commands
Top Command  Top Command: As a Linux system administrator, top command is a frequently used command and our daily tasks we used multiple times this commands to view resource utilization by processes on server. This command helps us to find which process is utilizing what resources of system. Result Row #1: Row 1 results … Continue reading monitoring commands
advanced file-permissions
Advanced File Permissions(sgid-suid-stickybit,chattr) SUID ( setuid ) :- If SUID bit is set on a file and a user executed it. The process will have the same rights as the owner of the file being executed. For example: passwd command have SUID bit enabled. When a normal user change his password this script update few … Continue reading advanced file-permissions
job-scheduling
Linux crontab is similar to windows task schedules. Crontab are very useful for routine tasks like scheduling system scanning, daily backups etc. Crontab executes jobs automatically in back-end on specified time interval. For scheduling one time tasks you can use at command in Linux. Linux crontab have six fields. 1-5 fields denotes time and 6’th … Continue reading job-scheduling
lvm
LVM [root@LVM ~]# rpm -qa | grep lvm lvm2-libs-2.02.118-2.el6.x86_64 lvm2-2.02.118-2.el6.x86_64 mesa-private-llvm-3.4-3.el6.x86_64 -------------------------------------------------------------------------------- [root@LVM ~]# fdisk /dev/sda WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): p Disk /dev/sda: 64.4 GB, 64424509440 bytes 255 heads, 63 sectors/track, 7832 … Continue reading lvm
Disk Partitioning and Mounting File System
[root@partitioning ~]# lsblk NAME  MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT loop0   7:0   0  3.6G  1 loop /mnt/iso sda    8:0   0  20G  0 disk ├─sda1  8:1   0  300M  0 part /boot └─sda2  8:2   0 17.7G  0 part / sr0   11:0   1 1024M … Continue reading Disk Partitioning and Mounting File System
filepermissions
Introduction Linux is a multi-user OS that is based on the Unix concepts of file ownership and permissions to provide security, at the file system level. If you are planning improving your Linux skills, it is essential that have a decent understanding of how ownership and permissions work. There are many intricacies when dealing with … Continue reading filepermissions
firewall(iptables)
This Linux based firewall is controlled by the program called iptables to handles filtering for IPv4, and ip6tables handles filtering for IPv6. I strongly recommend that you first read ourquick tutorial that explains how to configure a host-based firewall called Netfilter (iptables) under CentOS / RHEL / Fedora / Redhat Enterprise Linux. This post list … Continue reading firewall(iptables)
