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pattern search and print using sh

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# 1  
Old 12-14-2011
pattern search and print using sh
Hi All,

Have a file contains multiple line with the following

file.txt
Code:
insert: akdkas job:ksdjf
command: aldfasdf asdfsdfa asdfas.sh
machine: asdfa

need to grep for insert and machine and print only "akdkas,asdfa"
Code:
cat file.txt | egrep "insert|machine" | awk -F: '{print $2}'

output for the above
Code:
 akdkas job
 asdfa


but need to output as
Code:
akdkas,asdfa

Moderator's Comments:
Mod Comment How to use code tags

please advice, thank you so much in advance
Last edited by Franklin52; 12-15-2011 at 03:19 AM.. Reason: Please use code tags for code and data samples, thank you
# 2  
Old 12-14-2011
First off, grep, fgrep and egrep can all read files, so there is no need to use cat. You couls use:
Code:
egrep "pat1|pat2" filename

which is more efficient than
Code:
cat filename | egrep "pat1|pat2"

Secondly, since you want bits from two different lines, best to let awk do all of the work. Something like this:

Code:
awk '
    /^insert:/ { save = $2; next }
    /^machine:/ { printf( "%s,%s\n", save, $2 ); next }
'  input-file

Last edited by agama; 12-14-2011 at 09:30 PM.. Reason: typo; example
This User Gave Thanks to agama For This Post:
uniqme
# 3  
Old 12-14-2011
That is so cool Agama...

if i may want to make a bit complex

file.txt
insert: akdkas job:ksdjf
command: aldfasdf asdfsdfa asdfas.sh
machine: asdfa

how can i get the output for line "insert" and "command"

akdkas,asdfas.sh
# 4  
Old 12-14-2011
Same way:

Code:
awk '
    /^insert:/ { save = $2; next }
    /^command:/ { printf( "%s,%s\n", save, $3 ); next }
'  input-file

Just key on lines that start with command: and print the saved string from the insert line along with the third field.

If you want to print all three:
Code:
awk '
    /^insert:/ { save = $2; next }
    /^machine:/ { msave = $2; next }
    /^command:/ { printf( "%s,%s,%s\n", save, msave, $3 ); next }
'  input-file

# 5  
Old 12-14-2011
from the command line i need only to print "asdfas.sh" ..
# 6  
Old 12-14-2011
Then, simply this:

Code:
awk '/^command:/ {  $3; }'  input-file

This User Gave Thanks to agama For This Post:
uniqme
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