NAME
colon - null utility
SYNOPSIS
: [argument...]
DESCRIPTION
This utility shall only expand command arguments. It is used when a command is needed, as in
the then condition of an if command, but nothing is to be done by the command.
Does anyone know how to get these two output lines into one colon ':' separated line with some unix command? Maybe nawk. I've tried to read the nawk and awk man pages but I don't get it right. Are these commands the one to use?
Output from find command:
#
/sw/tools/matlab/7.0.1/man... (2 Replies)
I want to know how to delimit a colon in a file name while scp ing from one host to other host. I used forward slash(\) but that is not working. (1 Reply)
Hi guys,
This is my input
2735:<7001> 34 789 701 2
2774:<7001> 34 789 701 2
How to delete characters after colon :
Including colon : too ?
My output should... (3 Replies)
Can some one please explain why do we use colon in a grep statement .
for eg:
ORACLE_SID=$(grep :$(echo $JOBNAME |cut -c1-3): ${SWENV_TAB}|awk -F: '{print $1}')
Thanks in advance
Sri (5 Replies)
I'm using AIX 5.3 and running a awk replace to modify data as follows:
echo 1234: 1234 123 123 444 555 666 7777 | awk '/^:/{split($2,N);n=N} {n=$1} {sub(n,n+10000000)}1'
10001234 1234 123 123 444 555 666 7777
dumb question.. how do I get the colon back in, so it outputs
10001234: 1234... (4 Replies)
Although i tried multiple option i couldn't find a way to get the rigt ouput.
Say i have the following data
cat file.txt
C request
C response
C request
C response
The output should look like (9 Replies)
Hello All,
I was wondering if someone might know how to do this. I have a word list that is format like the example below. I need to take away the :number after that... is there some kind of command I could use to remove them?
123456:5562
password:1507
123456789:989
qwerty:877... (7 Replies)
I have a file that contains timestamp in some of the rows in the file and the field separator is colon and some of the rows have numerical values, timestamp and characters with colon as the field separator
We are looking to change colon in HH:MI:SS for the timestamp to hyphen “-“ leaving the field... (1 Reply)
I have entries like below in a file
11.22.33.44:80
22.33.44.55:81
:::587
:::465
What I need is to take out the part after colon ( : )
Output should be as follows.
80
81
587
465
I used cut -d: -f 2 but its not working as dedired. (2 Replies)
Hi
How do I print character after colon":"
below is input file
BUC1 : 33157147, BUC1 COUNT : 478455,BUC1 : 9930334.18
BUC2 : 1203100,BUC2 COUNT : 318678,BUC2 GIVEN : 3493491.59
BUC3 : 234567.99 expected output
33157147 478455 9930334.18
12031002 318678 3493491.59
234567.99 (10 Replies)
Discussion started by: scriptor
10 Replies
LEARN ABOUT POSIX
colon
COLON(1P) POSIX Programmer's Manual COLON(1P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
NAME
colon -- null utility
SYNOPSIS
: [argument...]
DESCRIPTION
This utility shall only expand command arguments. It is used when a command is needed, as in the then condition of an if command, but
nothing is to be done by the command.
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
Zero.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
: ${X=abc}
if false
then :
else echo $X
fi
abc
As with any of the special built-ins, the null utility can also have variable assignments and redirections associated with it, such as:
x=y : > z
which sets variable x to the value y (so that it persists after the null utility completes) and creates or truncates file z.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
Section 2.14, Special Built-In Utilities
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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 Stan-
dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE /The Open Group 2013 COLON(1P)