Introduction to Linux in HPC/Text display search

Video

Linux Introduction Slides 58 - 64 (7 pages)

Slide Layout

   page 1: 
       grep command and syntax
       important options: -r, -i and -I
   page 2: 
       many commands to display text
       cat
       less
       head and tail
   page 3: 40 sec
       console has three streams
           stdin
           stdout
           stderr
   page 4: 
       stream in computing terms
       similar to streaming video
       input/output stream in console
   page 5: 
       input/output streams can be redirected
           redirect stdout
           redirect stdin
           pipe
   page 6: 
       stream append redirection
       numbered streams: 0 for stdin, 1 for stdout, 2 for stderr
   page 7: 
       use grep to search piped output text

Quiz

1. Which command can be used to append text to filename?

	command > filename
	command >> filename

2. How do I find all files containing specific text on Linux?
HINT: use grep command

grep -rnw '/path/to/somewhere/' -e 'pattern'

Info:

no tips in this section