03-04-2013
Please show a representative sample of input and desired output. What is your script and what did not work?
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Hello Everyone,
I am new to scripting and confused with how to do this efficiently. I am trying to use AWK to do this.
I have a lot of files in a folder which has the data of my throughput measurements in two columns i.e. Serial # and Throughput. like this
177.994 847.9
178.996 ... (1 Reply)
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Helllo UNIX Forum :)
Since I am posting on this board, yes, I am new to UNIX!
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Hi
I have files in our UNIX directory like the below
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Hi!
I have 2 files containing data that I need to process at the same time, I have problems in reading a different number of lines from the different files.
Here is an explanation of what I need to do (possibly with an awk script).
File "samples.txt" contains data in the format:
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Hi,
I'd like to process multiple files. For example:
file1.txt
file2.txt
file3.txt
Each file contains several lines of data. I want to extract a piece of data and output it to a new file.
file1.txt ----> newfile1.txt
file2.txt ----> newfile2.txt
file3.txt ----> newfile3.txt
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I have five directories, dir1 to dir5
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for i in {1..5}
do
cd dir$i
mkdir temp1
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Hi,
I'm using awk command in bash script. I'm able to pass multiple files to awk for processing.The code i can use is as below(sample code)
#!/bin/bash
awk -F "," 'BEGIN {
...
...
...
}' file1 file2 file3
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Hello
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10. Shell Programming and Scripting
Hello
I posted on here a while ago about processing multiple files within a script.
See original post below:
I have a program cfxfrwb which is designed to remove headers from reports files.
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I run the program against... (8 Replies)
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trace(1) General Commands Manual trace(1)
Name
trace - trace system calls of programs
Syntax
trace [options] cmd args...
Description
The command with no flag arguments traces for the given cmd and args all system calls made and prints a time stamp, the PID, call and/or
return values and arguments and puts its output in the file trace.dump.
Options
-f filename
Puts dump in file filename.
-z Echos arguments only.
Only one of the following option arguments can be specified at one time.
-c# Traces given PIDs and their children. Up to sixteen PIDs can be specified.
-g# Traces given groups only. Up to sixteen Group IDs can be specified.
-p# Traces given PIDs only. Up to sixteen PIDs can be specified.
-s# Traces given system calls only. Up to sixteen PIDs can be specified.
-u# Traces given UIDs only. Up to sixteen PIDs can be specified.
Examples
trace -f ls.dump ls -l /dev >ls.out
runs the cmd ls -l /dev and puts the trace in ls.dump and output in ls.out.
trace -f csh.trace -p $$ &
will trace your login shell in the background. To stop the trace just send it a termination signal (that is, kill -TERM trace_pid).
Restrictions
Due to security, no one, not even the super-user can trace anyone else's programs. This sort of negates some of the usefulness of the -g
and -u flags.
The program cannot be traced.
Only 16 numbers can be given to the -c, -p, -g, -u, and -s flags.
The kernel configuration file must contain the following:
options SYS_TRACE
pseudo-device sys_trace
In addition, the superuser must use the following command sequence to create the device:
cd /dev
MAKEDEV trace
If both lines are not in the configuration file or if the device is not made, the message "Cannot open /dev/trace" appears.
Files
/dev/trace read only character special device for reading syscall data.
trace.dump default file for the system call trace data.
See Also
open(2), close(2), ioctl(2), select(2), read(2), trace(5)
trace(1)