For the following code:
Two points to clarify:
1. Is the -v flag for declaring we're going to work with a variable?
2. Does the $LN stands for current line? If so, what's wrong with $0? Any difference between them?
Thanks
I have the following error:
ls -lt | awk 'BEGIN NR > 1 { print $2, $9 }'
Syntax Error The source line is 1.
The error context is
BEGIN >>> NR <<< > 1 { print $2, $9 }
awk: 0602-500 Quitting The source line is 1.
What I want to do is ls a directory, skip the first... (3 Replies)
Hello,
I have the following command that does 2 searches.
awk '{if ($0 ~ /STRING1/) {c++} }{if ( c == 2 ) {sub(/STRING1/,"NEWSTRING") } } { print }' FILE
How do I search up after the first search?
thanks (4 Replies)
i have a little awk script that I use looks this:
awk '{if (FNR==1){print FILENAME; print $0}else print $0}' file1...file2....fi... > bundled.
i have completely forgotten how to unbundle this. I have tried several different approaches and still can not remember how to unbundle the file bundled.... (2 Replies)
I am trying to read through a file, gather the states in that file and change it from an abbreviation to the ful text.
Can anyone provide some assistance.
Thanks!! (4 Replies)
How I can rid of the following presentation du -sk /u*/oradata/TEST/*.dbf |awk '{print total+=$1} 1.28003e+06
4.35109e+06
4.36134e+06
4.4535e+06
5.47752e+06
5.48777e+06
7.52554e+06
7.73036e+06
9.06158e+06
:confused: thank you (3 Replies)
Can anyone help with this this one liner:
nawk -v RS='' '$1=$1' InputFile
What I have in the file:
0.0013985457223116
-0.0002338180925628
0.0
0.0003709430584958
-0.0005763523138347
0.0
And the output I want:
0.0013985457223116 -0.0002338180925628 0.0
0.0003709430584958... (1 Reply)
I have a script problem that I am not able to solve due my very limited understanding of unix/awk.
This is the contents of test.sh
awk '{print $1}'
From the prompt if I enter:
./test.sh Hello World
I would expect to see "Hello" but all I get is a blank line. Only then if I enter "Hello... (2 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
im using ls -l | xargs | awk '{what ever files here}'
im trying to get something that looks like this... (7 Replies)
Hi Experts,
I am trying to get system output to capture inside awk , but not working:
Please advise if this is possible :
I am trying something like this but not working, the output is coming wrong:
echo "" | awk '{d=system ("date") ; print "Current date is:" , d }'
Thanks, (5 Replies)
Discussion started by: rveri
5 Replies
LEARN ABOUT OSX
rwsnoop
rwsnoop(1m) USER COMMANDS rwsnoop(1m)NAME
rwsnoop - snoop read/write events. Uses DTrace.
SYNOPSIS
rwsnoop [-jPtvZ] [-n name] [-p PID]
DESCRIPTION
This is measuring reads and writes at the application level. This matches the syscalls read, write, pread and pwrite.
Since this uses DTrace, only users with root privileges can run this command.
OPTIONS -j print project ID
-P print parent process ID
-t print timestamp, us
-v print time, string
-Z print zone ID
-n name
process name to track
-p PID PID to track
EXAMPLES
Default output,
# rwsnoop
Print zone ID,
# rwsnoop -.Monitor processes named "bash", # rwsnoop -n bash
FIELDS
TIME timestamp, us
TIMESTR
time, string
ZONE zone ID
PROJ project ID
UID user ID
PID process ID
PPID parent process ID
CMD command name for the process
D direction, Read or Write
BYTES total bytes during sample
FILE filename, if file based. Reads and writes that are not file based, for example with sockets, will print "<unknown>" as the file-
name.
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
rwsnoop will run forever until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO rwtop(1M), dtrace(1M)version 0.70 Jul 24, 2005 rwsnoop(1m)