View All Posts * How to import and export data base from Mysql * SQL Server Operators * SQL Server Window Functions * SQL Server Date Functions * SQL Server Mathematical functions * SQL Server Aggregate Functions * SQL Server String Functions * SQL Server System Functions * `init 0`(is used to initiate a system shutdown in Linux.) * `uname -r`(” is used to display the kernel release information in Linux.) * `apt-get install package_name` * `cat file1 | command (sed, grep, awk, grep, etc …)> result.txt` * cat file1 file2 .. | command > file1_out.txt * `badblocks -v /dev/hda1`(is used to scan for bad blocks on the device or partition “/dev/hda1” in Linux systems.) * `mkfs /dev/hda1`(is used to create a file system on the device or partition) * `mkswap /dev/hda3` * `dump -0aj -f /tmp/home0.bak home` (is used to create a backup of the “home” directory using the “dump” utility.) * `cdrecord -v gracetime = 2 dev = /dev/cdrom -eject blank = fast -force` * `ifconfig eth0`(command is used to display the configuration information of the network interface named eth0) * `iptables -t filter -L`(is used to list the current firewall rules in the “filter” table of the “iptables” utility.) * `top` (command is a system monitoring utility in Linux and Unix-like operating systems.) * `uname -n`(command is used to print the network node hostname of the system.) * `uname -s`(command is used to print the kernel name of the operating system.) * `uname -a` (command is used to print detailed system information, including the kernel name, network node hostname, kernel release, kernel version, machine hardware name, and operating system.) * `uname -m` command is used to print the machine hardware name or architecture * `arch` (used to print the computer architecture)