Linux Command ref

-

Basic Operational Commands:
Show users logged in:
$who
$who am i

To list the files/Directories: $ls $ls -l
Navigate to a location
GoTo root directory:
$cd /
GoTo /home/oracle directory
$cd /home/oracle
GoTo 1 level up
$cd ..

To Concatenate files and print on the standard output
$cat
System Admin Commands:
Show System info:
$uname
$uname -r

Show kernel info
$cat /etc/issue

To determine available RAM and Swap space: $free To determine the Physical RAM size: $grep MemTotal /proc/meminfo To determine the size of configured Swap space: $grep SwapTotal /proc/meminfo To determine available disk space: $df -k
$df -k /tmp
$df -k /u01

To mount a PenDrive
Insert pen drive into USB device,
To mount pen drive use mout command. Find out device name using
$fdisk –l
You may see /dev/sda as pen drive and /dev/sda1 as partition. Now create directory in /mnt
$mkdir -p /mnt/usbpen
Mount pen
$mount /dev/sda1 /mnt/usbpen

Comments

Post a Comment

Popular posts from this blog

Crystal Report FAQ Error and Fixes

-
CrystalReports Crystal Report Versions: CrystalReports.com CrystalReports.com/download/ Crystal Reports, Developer for Visual Studio Downloads Common Errors for runtime version: 13.0.22.2668 Error: Failed to load database information. Details: Error in File rpt*** 17596_15752_{FC2EA1BF-082D-4345-947E-BE235A441BFD}.rpt: Failed to load database information. Details: System . Web . HttpExceptionThe file '/gsk/Reports/HRM/Viewer/CrystalImageHandler.aspx' does not exist . System . Web . HttpException ( 0x80004005 ) : The file '/gsk/Reports/HRM/Viewer/CrystalImageHandler.aspx' does not exist . at System . Web . UI . Util . CheckVirtualFileExists ( VirtualPath virtualPath ) at System . Web . Compilation . BuildManager . GetVPathBuildResultInternal ( VirtualPath virtualPath , Boolean noBuild , Boolean allowCrossApp , Boolean allowBuildInPrecompile , Boolean throwIfNotFound , Boolean ensureIsUpToDate ) at System . Web . Com...
Read more

Export DataTable or DataSet to CSV or XML

-
using System ; using System.Collections.Generic ; using System.Configuration ; using System.Data ; using System.Data.SqlClient ; using System.IO ; using System.Linq ; using System.Text ; using System.Web ; using System.Web.UI ; using System.Web.UI.WebControls ; using System.Xml.Serialization ; public partial class ExportReservationInfo : System . Web . UI . Page { #region Events protected void Page_Load ( object sender , EventArgs e ) { lblMsg . Text = "" ; if ( Page . IsPostBack ) { } } protected void btnExportToCSV_Click ( object sender , EventArgs e ) { string strReservationId = txtReservationId . Text . Trim (); DataSet ds ; try { int ReservationId = Convert . ToInt32 ( strReservationId ); ds = ExecuteQuery ( ReservationId ); //Export to CSV ExportToSpr...
Read more