How to compare current record,with next and previous record in awk without using array?
Hi! all
can any one tell me how to compare current record of column with next and previous record in awk without using array
my case is like this
input.txt
output needed
just try to implement this logic without using array
and it has to consider first column also that is if next record of column 1 is greater than current record
being beginner getting many syntax error those who know please help
I am going to develop a address book using the shell scripting commands without sed, awk, .... I am thinking to apply the concept of 2 dimenstional array. Can I create a two dimensional array for the insertion/updation/deletion of record in unix. If yes then tell me plz or recommend me some... (1 Reply)
Hi
I have a table with name, date in format DD.MM.YYYY.
I need to something like this (I try to explain in pseudo code)
if SYSDATE (current date) minus 6 months > $expiry date
print OK
else print NOK with $name and $expiry date
I know this is possible with Oracle. How to do this... (0 Replies)
Hi,
I have one small doubt how to go ahead and process the below requirement.
File Content
1,abc,10
2,xyz,11
3,pqr,12
4,pqr,13
5,pqr,14
Output file expected:
1,mnq,1
1,ddd,2
1,qqq,3
1,sss,4
1,ddd,5
1,eee,6
1,fff,7
1,ddr,8
1,rrd,9 (3 Replies)
Hi,
I have a input file with the following entries:
1one
2two
3three
1four
2five
3six
1seven
1eight
1nine
2ten
The output should be
1one
2two
3three
1four
2five
3six (2 Replies)
Hi,
I have a input file with the following entries:
1one
2two
3three
1four
2five
3six
1seven
1eight
1nine
2ten
2eleven
2twelve
1thirteen
2fourteen
The output should be: (5 Replies)
I'm trying to compare 2 files for differences in a selct number of fields. When differnces are found it will write the whole record of the second file including appending '|C' out to a delta file. Each record will have 20 fields, but only want to do comparison of 1st 15 fields. The 1st field of... (7 Replies)
I have data coming in the below format for each record
<?xml version="1.0" encoding="UTF-8" standalone="no"?><test_sox xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><testdetials>....</test_sox>
<?xml version="1.0" encoding="UTF-8" standalone="no"?><test_sox... (8 Replies)
Hi,,
I have requirement that i need to get DISTINCT values from a table and if there are two records i need to update it to one record and then need to submit INSERT statements by using the updated value as a parameter. Here is the example follows..
SELECT DISTINCT ID FROM OFFER_GROUP WHERE... (1 Reply)
Hey,
I am trying to compare formated login and logout dates from one user at a host which I have stored in a tmp directory in order to find out the total login time. I need to compare them in order to find overlapping intervals.
At first I tried to store each log in and logo date in an array... (3 Replies)
Discussion started by: Mumu123
3 Replies
LEARN ABOUT LINUX
runlevel
runlevel(8) System Manager's Manual runlevel(8)NAME
runlevel - output previous and current runlevel
SYNOPSIS
runlevel [OPTION]... [UTMP]
DESCRIPTION
runlevel reads the system UTMP file, which defaults to /var/run/utmp when no alternate filename is given, to locate the most recent run-
level record.
The previous and current runlevel from that record are output separated by a single space. If there is no previous runlevel in the record,
the letter N will be substituted.
If no runlevel record can be found, runlevel outputs the word unknown and exits with an error.
During system boot, the environment variables RUNLEVEL and PREVLEVEL will be set by the init(8) daemon, these come from the runlevel(7)
event generated by telinit(8) or shutdown(8).
When these environment variables are set, runlevel will output the values from these instead. Thus runlevel can be used in rc scripts as a
replacement for the System-V who(1)-r command.
OPTIONS --quiet
Does not output the current and previous runlevel, nor does it output unknown in the case of error (but it will exit with an error
code).
This may be used to test for the presence of a runlevel entry, or to check for errors reading from the file.
EXIT STATUS
runlevel will exit with status 0 if a UTMP record was found, otherwise it will exit with status 1.
ENVIRONMENT
RUNLEVEL
runlevel will read the current runlevel from this environment variable if set in preference to reading from /var/run/utmp
PREVLEVEL
runlevel will read the previous runlevel from this environment variable if RUNLEVEL
was given, in preference to reading from /var/run/utmp
FILES
/var/run/utmp
Where the current and previous runlevels will be read from.
NOTES
The Upstart init(8) daemon does not keep track of runlevels itself, instead they are implemented entirely by its userspace tools.
A change of runlevel is signalled by the runlevel(7) event, generated by either the telinit(8) or shutdown(8) tools. This event includes
the new runlevel in the RUNLEVEL environment variable, as well as the previous runlevel (obtained from their own environment or from
/var/run/utmp) in the PREVLEVEL variable.
As well as generating the event, both tools write the new runlevel back to /var/run/utmp and append a new entry to /var/log/wtmp.
AUTHOR
Written by Scott James Remnant <scott@netsplit.com>
REPORTING BUGS
Report bugs at <https://launchpad.net/upstart/+bugs>
COPYRIGHT
Copyright (C) 2009 Canonical Ltd.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO runlevel(7)init(8)telinit(8)shutdown(8)who(1)Upstart 2009-07-09 runlevel(8)