There might be a performance problem also, because grep might do the comparisons one after the other, like a loop would do, for each line. Anchoring makes each comparison only a little faster.
If you have a plain stringlist file without RE wildcards and without spaces, while your main file is space separated and your strings should match the first field, then a hash is much faster. With awk
Last edited by MadeInGermany; 04-21-2016 at 03:43 AM..
This User Gave Thanks to MadeInGermany For This Post:
Hello guys,
should be a very easy questn for you:
I need to delete strings in file1 based on the list of strings in file2.
like file2:
word1_word2_
word3_word5_
word3_word4_
word6_word7_
file1:
word1_word2_otherwords..,word3_word5_others... (7 Replies)
Hi,
I want to extract some text between two strings in a line i am using following command i.e;
awk '/-string1/,/-string2/' filename
contents of file is---
line1
line2
aaa -bbb -ccc -string1 c,d,e -string2
line4
but it is showing complete line which is having searched strings.
aaa... (19 Replies)
The question is not as simple as the title... I have a file, it looks like this
<string name="string1">RZ-LED</string>
<string name="string2">2.0</string>
<string name="string2">Version 2.0</string>
<string name="string3">BP</string>
I would like to check for duplicate entries of... (11 Replies)
test.txt:
appleboy
orangeletter
sweetdeal
catracer
conducivelot
I want to only grep out lines that contain "appleboy" AND "sweetdeal". however, the closest thing to this that i can think of is this:
cat test.txt | egrep "appleboy|sweetdeal"
problem is this only searches for all... (9 Replies)
I have the following lines in a log file. It would be great if some one can help me to create a new file with the just entries in the below format.
66.150.161.195 HPSAC=Z05
66.150.161.196 HPSAC=A05
That is just extract the IP address and the string DPSAC=its value
66.150.161.195 -... (1 Reply)
Hi,
Im having some problems with this. I have loaded a file with html code. All code is placed in the same line. I want to get everything between two given strings (including these strings and get only the first appearance).
Example:
File contains <html><body><a href='a.html'>abc</a><a... (5 Replies)
Hi
I have a txt file and I would like to use egrep without using -v option to exclude the lines which matches with multiple Strings.
Let's say I have some text in the txt file. The command should not fetch lines if they have strings something like
CAT MAT DAT
The command should fetch me... (4 Replies)
Hello Everyone ,
Iam a newbie to shell programming and iam reaching out if anyone can help in this :-
I have two files
1) Insert.txt
2) partition_list.txt
insert.txt looks like this :-
insert into emp1 partition (partition_name)
(a1,
b2,
c4,
s6,
d8)
select
a1,
b2,
c4, (2 Replies)
Hello
i am stuck with this.
i have input which is as follows
/type/work /works/OL10627594W 3 2019-04-24T16:46:21.351549 {"created": {"type": "/type/datetime", "value": "2009-12-11T03:18:17.488715"}, "title": "Tog the dog", "covers": , "last_modified": {"type":... (3 Replies)
I am having the following output when executing a dig command :
dig @1.1.1.1 google.com +noall +answer +stats
; <<>> DiG 9.11.4-P1 <<>> @1.1.1.1 google.com +noall +answer +stats
; (1 server found)
;; global options: +cmd obodrm.prod.at.dmdsdp.com. 86154 IN A ... (1 Reply)
Discussion started by: liviusbr
1 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)