11-12-2014
It seems to work because $COL will evaluate to $0 when COL has a string value. So your code will match $0 against "vinay" and print the entire first line. Test this by setting
col='$3' or adding some fields to the file.
The same is valid for your second proposal - if no positional parameter is available, you'll match $0 against "vinay". Test this by e.g.
set -- 2 3 4 and running your code. $2 will be "3", and field 3 doesn't have "vinay" - nothing's printed...
---------- Post updated at 12:12 ---------- Previous update was at 12:10 ----------
Quote:
Originally Posted by
Girish19
. . .
ssh user@host " AWK Command "
. . .
What's the results of using the proposals in this thread for your " AWK Command "?
This User Gave Thanks to RudiC For This Post:
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PCSCTEST(8) User Manual PCSCTEST(8)
NAME
pcsctest
SYNOPSIS
pcsctest
DESCRPTION
pcsctest runs a test on pcscd, lists the readers currently connected, and displays card information if a card is inserted.
OPTIONS
None
USAGE
pcsctest lists the currently connected readers and asks the user to choose one. After choosing the reader, pcsctest will ask the user to
insert a card into the card reader. If this happens pcsctest will display the cards's ATR and other information.
Example:
The following will occur if no reader is inserted and recognized:
MUSCLE PC/SC Lite Test Program
Testing SCardEstablishContext : Command successful.
Testing SCardGetStatusChange
Once a reader is inserted and recognized the following will occur:
MUSCLE PC/SC Lite Test Program
Testing SCardEstablishContext : Command successful.
Testing SCardGetStatusChange
Please insert a working reader : Command successful.
Testing SCardListReaders : Command successful.
Reader 01: SCM SCR-331 CCID 0 0
Enter the reader number : 1
Waiting for card insertion
: Command successful.
Testing SCardConnect : Command successful.
Testing SCardStatus : Command successful.
Current Reader Name : CCID USB Reader 0 0
Current Reader State : 34
Current Reader Protocol : 0
Current Reader ATR Size : 9
Current Reader ATR Value : 3B E2 00 00 04 03 00
Testing SCardDisconnect : Command successful.
Testing SCardReleaseContext : Command successful.
PC/SC Test Completed Successfully !
SEE ALSO
pcscd(8)
BUGS
MacOSX March 2003 PCSCTEST(8)