I've used awk for some simple scripting, but having trouble figuring out how to search a couple of data files that have Name/Address/Zip Codes from another file that has list of only Zip Codes, and write out the lines that matched.
Zip code field in the data file is 27
I was thinking... (5 Replies)
Hi all,
I am tryin to join two files, duplicating the alues from the first one as many times as the second.
File one :
11 211
File two:
a
b
c
Result:
11 211 a
11 211 b
11 211 c
Any advise will be apreciate.
Thanks (3 Replies)
We have these files in say \home\abcd\dm
Summary.txt
log_SI-100.lst
log_SI-101.lst
log_SI-106.lst
The contents of Summary.txt is as below
./log_SI-100.lst:Error detected, rollbacking ./log_SI-101.lst:Error detected, rollbacking ./log_SI-106.lst:Error detected, rollbacking
Now i... (5 Replies)
Hi All,
This is what I am trying to achieve but to no avail.
I have three sets of files which are:
1. One big dictionary file which looks like this:
apple
orange
computer
pear
country
2. Some thousands of text files which are named as 1.dat, 2.dat, 3.dat etc
The text files... (2 Replies)
I have results from some statistical analyses.
The format of the results are as given below:
I want to select lines that have a p-value (last column) less than 0.05 from all the results files (*.results) and cat to a new results file.
It would be very nice if a new column is added that tells... (2 Replies)
- I have two files (File 1 and File 2) and the contents of the files are mentioned below.
- I am trying to compare the values of Column1 of File1 with Column1 of File2. If a match is found, print the corresponding value from Column2 of File1 in Column5 of File2.
- I tried to modify and use... (10 Replies)
Hi, I am new to shellscripting, I have two files as below
File1:
Abcdefg110111xyza000000600000000024.020000060000000000024.020000004660000000003.41000000000010000000100.000000000123
File 2:... (3 Replies)
Hi,
I need a shell script, which would search the result values from another files.
1)execute " select column1 from table_name" query on the table.
2)Based on the result, need to be grep from .wft files.
could please explain about this.Below is the way i am using.
#!/bin/sh... (4 Replies)
Hi,
I was having the following issue
cat input
hello1, my name is unix.com. I am awesome. Hope you know this, hello2!
cat hello1.txt
Hi Friends
Hi Folks
Hi Well-Wishers
cat hello2.txt
Honey
Sweety
Darling
Required Output (8 Replies)
Discussion started by: jacobs.smith
8 Replies
LEARN ABOUT LINUX
exec
EXEC(P) POSIX Programmer's Manual EXEC(P)
NAME
exec - execute commands and open, close, or copy file descriptors
SYNOPSIS
exec [command [argument ...]]
DESCRIPTION
The exec utility shall open, close, and/or copy file descriptors as specified by any redirections as part of the command.
If exec is specified without command or arguments, and any file descriptors with numbers greater than 2 are opened with associated redi-
rection statements, it is unspecified whether those file descriptors remain open when the shell invokes another utility. Scripts concerned
that child shells could misuse open file descriptors can always close them explicitly, as shown in one of the following examples.
If exec is specified with command, it shall replace the shell with command without creating a new process. If arguments are specified,
they shall be arguments to command. Redirection affects the current shell execution environment.
OPTIONS
None.
OPERANDS
See the DESCRIPTION.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
None.
ASYNCHRONOUS EVENTS
Default.
STDOUT
Not used.
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
If command is specified, exec shall not return to the shell; rather, the exit status of the process shall be the exit status of the program
implementing command, which overlaid the shell. If command is not found, the exit status shall be 127. If command is found, but it is not
an executable utility, the exit status shall be 126. If a redirection error occurs (see Consequences of Shell Errors ), the shell shall
exit with a value in the range 1-125. Otherwise, exec shall return a zero exit status.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
Open readfile as file descriptor 3 for reading:
exec 3< readfile
Open writefile as file descriptor 4 for writing:
exec 4> writefile
Make file descriptor 5 a copy of file descriptor 0:
exec 5<&0
Close file descriptor 3:
exec 3<&-
Cat the file maggie by replacing the current shell with the cat utility:
exec cat maggie
RATIONALE
Most historical implementations were not conformant in that:
foo=bar exec cmd
did not pass foo to cmd.
FUTURE DIRECTIONS
None.
SEE ALSO
Special Built-In Utilities
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE /The Open Group 2003 EXEC(P)