Actually this is a pipeline consisting of two components (mysqldump and gzip). The success of this pipeline depends in the success of the two programs; either mysqldump may fail or gzip (or both ofcourse). It's better to rewrite these lines as follows:
The pipefail bash option is controlling the exit status of a pipeline (read the manual pages for bash). Of course the two components must be written correctly from their authors (exiting with non zero exit statuses when failures occur).
Hi friends, :)
In a shell script i found the following if condition.
echo -n "Which version of $1 do you want to restore ('0' to quit)? : "
read desired
if ${desired:=1} -ge $index ] ; then
echo "$0: Restore canceled by user: index value too big." >&2
exit 1
fi
Can... (1 Reply)
i have a paramter data_date in which i am passing a string value.i want to find out another paramter file_date from this.the logic is given below
if day of data_date = sunday or monday
then
file_date=data_date-1
else
file_date=data_date-2
i am passing data_date as 20061027.
how can i... (3 Replies)
Hi,
I am trying to execute this command, but is it not working, says "`;' unexpected"
eval $lgrep $SAM_CMD ; if ; then ; echo "No Error" ; fi
What i want is, return the command output, if it is non zero, say "No Error".
Thanks, John. (21 Replies)
Executed the following if conditions .. and got different results .
only (( )) gave correct o/p with all scenarios .
Can anybody please let me know what is the difference between and ] and ((condition)) when used with if condition.
And why each condition gave different result.
1.... (2 Replies)
hi,
I have some problems in my simple script about the redirect echo stdout command inside a condition. Why is the echo command inside the elif still execute in the else command
Here are my simple script
After check on the two diff output the echo stdout redirect is present in two diff... (3 Replies)
HI
My doubt may be basic one but I need to get it clarified..
When i use "if" condition that checks for many AND, OR logical conditions
like
if ]; then
return 0
fi
Even the if condition fails it returns as zero.. Any clue..
But if i add else condition like
if ]; ... (2 Replies)
Hi all
Unix newbie - please be gentle
Am modifying an existing script to error trap a variable with a length of 0
#!/bin/bash
ipfile='/var/data/bin/ipaddress'
] && ipold="$(< "$ipfile" )"
ipnew="$( wget -q -O - checkip.dyndns.org | sed -e 's/.*Current IP Address: //;s/<.*$//' )"
#... (6 Replies)
o/p of my command is given below
My requirement is
if Pnumber is 0 then
stabilization.Build.2013
else
stabilization.PBuild.2013.3 (11 Replies)
Discussion started by: nikhil jain
11 Replies
LEARN ABOUT CENTOS
accounting
ACCOUNTING(1) SMPPPD ACCOUNTING(1)NAME
accounting - calculates statistics about your internet connections
DESCRIPTION
accounting is a simple program to calculate statistics about your internet dial-up connections that are started and stopped by either ifup
and ifdown or by a frontend to smpppd like cinternet , qinternet or kinternet.
OPTIONS
These options are recognized by accounting. If a long option shows an argument as mandatory, then it is mandatory for the equivalent short
option also.
-l, --last=NUM
Only consider the last NUM connections.
-a, --after=DATE
Only consider connections started after DATE. DATE is a date with optional time in ISO 8601 format, e.g. `2002-12-24 20:15:00'.
Note that a date without time is treated as if the time is 00:00:00. Hence connections started on the specified date are consid-
ered.
-b, --before=DATE
Only consider connections started before DATE.
-u, --user=USER
Only consider connections started by user USER.
--this-year
Only consider connections started this year.
--last-year
Only consider connections started last year.
--this-month
Only consider connections started this month.
--last-month
Only consider connections started last month.
--this-week
Only consider connections started this week.
--last-week
Only consider connections started last week.
--today
Only consider connections started today.
--yesterday
Only consider connections started yesterday.
--per-year
Show summaries on a per year basis.
--per-month
Show summaries on a per month basis.
--per-week
Show summaries on a per week basis.
--per-day
Show summaries on a per day basis.
-c, --connections
Only list the connections but do not show provider statistics.
-p, --providers
Do not list the connections only show the provider statistics.
--connection-format=FORMAT
The names of the columns to print in the connection list. The names must be separated by a comma. Known column names are time,
type, provider, user, status, duration, rx, tx, rxtx, averx, avetx and averxtx. Each name may be appended by a colon and a number
indicating the width for the column, e.g. provider:25. The value will not be truncated if the width is too small.
--provider-format=FORMAT
The names of the columns to print in the provider list equivalent to the --connection-format option. Known column names are
provider, number, duration, rx, tx, rxtx, aveduration, averx, avetx and averxtx.
--local
Display all dates in local time. Also interpret dates on the command line in local time. This is the default.
--utc Display all dates in UTC. Also interpret dates on the command line in UTC.
--script[=STYLE]
Format output for script. Known styles are c and sh.
-f, --file=NAME
Use a different file with accounting information.
--report-errors
Report erros in the accounting file.
--version
Show program version and exit.
--help Show help information and exit.
NOTES
All informations are only obtained through the accounting log. Hence the informations, esp. the data volume, of currently active connec-
tions is not accurate. If you want the know the status of a connection, use ifstatus or a frontend to smpppd like cinternet , qinternet or
kinternet instead.
The user field is empty for connections started by a remote frontend of smpppd.
BUGS
Not yet implemented for ISDN (ippp).
FILES
/var/log/smpppd/accounting.log
File containing accounting information.
SEE ALSO
kinternet, qinternet, cinternet(1), smpppd(8), smpppd-ifcfg(8).
AUTHOR
Arvin Schnell <arvin@suse.de>
SuSE December 2002 ACCOUNTING(1)