Thursday, December 23, 2010

Linux-Working with files

To find the type of a file
     file <file name>
To create a file
     cat > filename.txt
          //type the contents and press Ctrl+D to exit
To display the contents of a text file
     cat <file name>
To view the contents of a file page by page
     more <file name>
          //traversal only in forward direction
     less <file name>
          //traversal in both directions
To display first few lines of a file
     head <file name>
     head -5 <file name>
          //first 5 lines
To display last few lines of a file
     tail <file name>
     tail -5 <file name>
          //last 5 lines
To display the last few lines of a text file, and then output
appended data as the file grows (very useful for following log
files!)
     tail -f /var/log/messages
To copy a file from one location to another
     cp [-r] <source file/directory> <destination>
          eg: cp mp3files.txt /tmp
To move a file to a new location
     mv <source> <destination>
          eg: mv mp3files.txt /tmp
To delete a file
     rm [-r] <filename/directory name>
          eg: rm /tmp/mp3files.txt

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