I know tee. But tee also waits until some lines are printed and then print and write to the file at once not in one by one.
somescript.sh takes prints one line every one minute and doing the above two methods will wait until some lines i think 120 lines are printed and then written to the file.
In other words If I do,
Code:
./somescript.sh > output.txt
and then do
Code:
wc -l output.txt
it always show 0, instead of writing 1 line each minute, and suddenly after some time the number of lines written are 120 (approximately)
You know what I mean ?
anybody can help, plz:
I want to pass the output of "ls" to "grep":
ftp -n host <<!
USER user passwd
ls
bye
! | grep file
exit 0
It does not work!!
Any idea??
Sami (7 Replies)
I am using grep and I want the output to go into two files without going to the screen. I used tee to get the output into two files, but it is also putting the output on the screen which i do not want. Can this be fixed. (2 Replies)
I have access to an AIX 5.3 box, where I need to write a report to:
/tmp/report
The report is larger then the amount of available disk space on the box.
There's about 1 GB of free space, for a 1.5 GB report.
The report is destined for another box (10.0.0.2) anyway, which has enough free... (2 Replies)
Is there a way I can do this:
search for text and replace line containing matched text with a different line?
For example:
"I want to replace text"
I want to search for replace and then change the line to
I am perplexed.
Hope that makes sense.
Thanks in advance. (4 Replies)
Hi,
I am having a list of directories with different login id's. My requirement is that i need to list the directories of my id and need to delete them. So i am using following code
ls -ltr ¦ grep userid ¦ rm -rf
But this is not working. So is there any way of doing it. Please note... (3 Replies)
I have a script that finds all sffs and extracts them into .fastq file types. What I need to do is change the .fastq to .fasta using the below script. How can I change the input.fastq and output.fasta to mirror the file's name? Would I use an array and use the default iterator?
#!/bin/bash
... (3 Replies)
Hi All,
i have the following command
df|awk '{print $5}'|grep /| egrep -v '^/$|/usr|/opt|/var/log|/home|/tmp'
output looks like:
/filesystem/number1
/filesystem/number2
/filesystem3
/possiblymoreoutput
i want the output to look like the below (either in a file or to output to... (3 Replies)
I'd like to have the output from this script piped to a text file that has the date at the beginning of it. For example, my ideal would be something like this
$./run_script.sh
$ls *.out
2013-Feb-26-output_filename.out
Here's the code I'm using.
#! /bin/ksh
DAT=`date '+%Y-%b-%d'`
for... (2 Replies)
xargs work great when a command gives multiple line output which can be input to another. In my case it is not working coz the second command uses two words in it.
$ scr.sh
gives output like
193740
638102
375449
..
..
another command takes these number as inputs. it works great... (1 Reply)
I'm trying to get an output to echo on the next line in a given color and outputted next to a label.
Sorry if that's a bit vague, see below.
#!/bin/bash
YELLOW=$(tput setaf 3 && tput bold)
echo -n 'plaintext' | openssl md2 || read hash
echo "$YELLOW Hash:$hash"
But I can't seem to get the... (2 Replies)
Discussion started by: 3therk1ll
2 Replies
LEARN ABOUT OSX
pipe
PIPE(2) BSD System Calls Manual PIPE(2)NAME
pipe -- create descriptor pair for interprocess communication
SYNOPSIS
#include <unistd.h>
int
pipe(int fildes[2]);
DESCRIPTION
The pipe() function creates a pipe (an object that allows unidirectional data flow) and allocates a pair of file descriptors. The first
descriptor connects to the read end of the pipe; the second connects to the write end.
Data written to fildes[1] appears on (i.e., can be read from) fildes[0]. This allows the output of one program to be sent to another pro-
gram: the source's standard output is set up to be the write end of the pipe; the sink's standard input is set up to be the read end of the
pipe. The pipe itself persists until all of its associated descriptors are closed.
A pipe whose read or write end has been closed is considered widowed. Writing on such a pipe causes the writing process to receive a SIGPIPE
signal. Widowing a pipe is the only way to deliver end-of-file to a reader: after the reader consumes any buffered data, reading a widowed
pipe returns a zero count.
The generation of the SIGPIPE signal can be suppressed using the F_SETNOSIGPIPE fcntl command.
RETURN VALUES
On successful creation of the pipe, zero is returned. Otherwise, a value of -1 is returned and the variable errno set to indicate the error.
ERRORS
The pipe() call will fail if:
[EFAULT] The fildes buffer is in an invalid area of the process's address space.
[EMFILE] Too many descriptors are active.
[ENFILE] The system file table is full.
SEE ALSO sh(1), fork(2), read(2), socketpair(2), fcntl(2), write(2)HISTORY
A pipe() function call appeared in Version 6 AT&T UNIX.
4th Berkeley Distribution February 17, 2011 4th Berkeley Distribution