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khandu 11-18-2012 02:35 AM
Need a particular sed / grep command to solve problem
 
I am running some command in terminal.. and getting the following result

Code:
      VRAM (Total): 1024 MB
NOTE the gap in the starting..

Now I really want to create two commands.

1) remove the gap from start and give the result.. so result should be

Quote:
VRAM (Total): 1024 MB
and

2) Remove starting text entirely and just give

Quote:
1024 MB
Help please.. I am just playing around with geektool in mac and want to grab this part as a result..

catkin 11-18-2012 03:07 AM
A pure bash solution:
Code:
#!/bin/bash
shopt -s extglob  # Enable extended globbing
var='      VRAM (Total): 1024 MB'
var2=${var##*( )}  # The *( ... ) requires extended globbing
echo ">$var2<"
var3=${var#*: }
echo ">$var3<"
Extended globbing is explained here, at the end of the section.

khandu 11-18-2012 03:09 AM
Quote:
Originally Posted by catkin (Post 4831841)
A pure bash solution:
Code:
#!/bin/bash
shopt -s extglob  # Enable extended globbing
var='      VRAM (Total): 1024 MB'
var2=${var##*( )}  # The *( ... ) requires extended globbing
echo ">$var2<"
var3=${var#*: }
echo ">$var3<"
Extended globbing is explained here, at the end of the section.
thanks.. but forgot to mention..

it needs to be a one line terminal solution.. as I am grepping this in a command.. I want to extend the command to get the desired result.. i guess need some kind of regex to do this?

catkin 11-18-2012 03:13 AM
Quote:
Originally Posted by khandu (Post 4831843)
I want to extend the command to get the desired result.
In the OP you suggest you want two results. Do you actually want only the last result?

khandu 11-18-2012 03:20 AM
actually need two seperate results.. not in same command.. sorry for the confusion

so one command will give me 1 and second will give me 2..

so I guess I am looking for two seperate grep / sed commands..

catkin 11-18-2012 03:26 AM
Code:
c@CW9:~$ echo '      VRAM (Total): 1024 MB' | sed 's/^ *//'
VRAM (Total): 1024 MB
c@CW9:~$ echo '      VRAM (Total): 1024 MB' | sed 's/.*: //'
1024 MB

khandu 11-18-2012 03:34 AM
Quote:
Originally Posted by catkin (Post 4831854)
Code:
c@CW9:~$ echo '      VRAM (Total): 1024 MB' | sed 's/^ *//'
VRAM (Total): 1024 MB
c@CW9:~$ echo '      VRAM (Total): 1024 MB' | sed 's/.*: //'
1024 MB
Thanks :)


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