I need help with this:
Can any one tell me what does these below mean:
1. "\(.\).*") != '/'
2. sed 's+^\./++;s+/.*++'
3. sed "s+${f}/+ +
Thanks in advance (7 Replies)
HI
system.sysUpTime.0 : Timeticks: (1519411311) 175 days, 20:35:13.11
From the above output i need only 175days in a perl script..
Please Help (2 Replies)
in shell scripting there is extensive usage of
i> regular expression
ii>sed
iii>awk
can anyone tell me the suitable contexts ...i mean which one is suitable for what kind of operation.
like the reg-exp and sed seems to be doing the same job..i.e pattern matching (1 Reply)
Anyone know how I will use awk's variable in a regular expression?
This line of code of mine is working, the value PREMS should be a variable:
awk '$1 ~ /PREMS/ { if(length(appldata)+2 >= length($1)) print $0; }' appldata=$APPLDATA /tmp/file.tmp
The value of APPLDATA variable is PREMS.
... (2 Replies)
Hello,
I have thousand of messages (HL7), I want to use awk to extract only the ones that have a particular value in pv1.18
Each record in the file is the whole HL7 message, ie. when I print $0 I get the whole message MSH EVN PID etc. ,there is an x0d between the segments.
I would like to use a... (3 Replies)
Please let me understand this reg expression
(\s+')(.*)('\s+)(.)(.*)(\/.*)/)
i have doubt in the below 2.I'm not understanding why back-tick used?
(\s+') and ('\s+) (2 Replies)
how to uniquely match each of the words seperated by / in perl
${REP_PATH}/FUNCTIONAL/wide1c_1.0V/max/qor.rpt
https://www.unix.com/images/misc/progress.gif (5 Replies)
Hello All,
What i am trying to do is read the input file delimited by pipe and do further logic like simulating the for loop but using awk not sure if this a right approach but as i was told doing "for i in `cat $file`" is an over kill so trying to replicate the same thing using awk script below.... (6 Replies)
Need your help in creating regular expression for particular set. let say I have given two dates 20130623 to 20140625.
I need to create regular for the dates which fall in between above two dates. (4 Replies)
Discussion started by: gvkumar25
4 Replies
LEARN ABOUT DEBIAN
wdmd
WDMD(8) System Manager's Manual WDMD(8)NAME
wdmd - watchdog multiplexing daemon
SYNOPSIS
wdmd [OPTIONS]
DESCRIPTION
This daemon opens /dev/watchdog and allows multiple independent sources to detmermine whether each KEEPALIVE is done. Every test interval
(10 seconds), the daemon tests each source. If any test fails, the KEEPALIVE is not done. In a standard configuration, the watchdog timer
will reset the system if no KEEPALIVE is done for 60 seconds ("fire timeout"). This means that if single test fails 5-6 times in row, the
watchdog will fire and reset the system. With multiple test sources, fewer separate failures back to back can also cause a reset, e.g.
T seconds, P pass, F fail
T00: test1 P, test2 P, test3 P: KEEPALIVE done
T10: test1 F, test2 F, test3 P: KEEPALIVE skipped
T20: test1 F, test2 P, test3 P: KEEPALIVE skipped
T30: test1 P, test2 F, test3 P: KEEPALIVE skipped
T40: test1 P, test2 P, test3 F: KEEPALIVE skipped
T50: test1 F, test2 F, test3 P: KEEPALIVE skipped
T60: test1 P, test2 F, test3 P: KEEPALIVE skipped
T60: watchdog fires, system resets
(Depending on timings, the system may be reset sometime shortly before T60, and the tests at T60 would not be run.)
A crucial aspect to the design and function of wdmd is that if any single source does not pass tests for the fire timeout, the watchdog is
guaranteed to fire, regardless of whether other sources on the system have passed or failed. A spurious reset due to the combined effects
of multiple failing tests as shown above, is an accepted side effect.
wdmd will exit if a watchdog driver is not loaded.
wdmd cannot be used on the system with any other program that needs to open /dev/watchdog, e.g. watchdog(8).
Test Source: clients
Using libwdmd, programs connect to wdmd via a unix socket, and send regular messages to wdmd to update an expiry time for their connection.
Every test interval, wdmd will check if the expiry time for a connection has been reached. If so, the test for that client fails.
(Other test sources such as scripts executed each test interval may be added in the future.)
OPTIONS -D Enable debugging to stderr and don't fork.
-H num Enable (1) or disable (0) high priority features such as realtime scheduling priority and mlockall.
Default 1.
2011-08-01 WDMD(8)