How to prevent grep command from throwing a system trap if No match is found.
Hi
How to prevent grep command from throwing a system trap(or returning error status) if No match is found in the specified file(s) ?
Consider this simple shell script:
Now if the files server* dont have matching string "ABC", it throws the trap and gets caught, which I dont want to happen.
I want the file logfile.log to be empty if no match is found.
But if, the file server* dont even exist, then I want trap to catch it and show the error.
find: /home/Upload/*: No such file or directory
I am getting a find error when I run
for FILE in `find /home/Upload/* -prune -type f -newer TIMEFILE`
do
I need to run this job every 10 minutes to upload any new files that were added. Is there an easy way to prevent this?
Thanks (6 Replies)
Hello,
How do I use grep to find a pattern in a list of file and then display 5 lines after the pattern is matched
Eg:
I want to match the string GetPresentCode in all files in a folder and then see 4 lines following this match. I am not sure if grep is what should be used to achieve. Thanks!... (3 Replies)
Hi
i have a file which have a pattern like this
Nov 10 session closed
Nov 10 Nov 9 08:14:27 EST5EDT 2010 on tty .
Nov 10 Oct 19 02:14:21 EST5EDT 2010 on pts/tk .
Nov 10 afrtetryytr
Nov 10 session closed
Nov 10 Nov 10 03:21:04 EST5EDT 2010
Dec 8 Nov 10 05:03:02 EST5EDT 2010
... (13 Replies)
Hi,
I am using following code to send an e-mail with attachment and body.
echo "To: user1@mail.com,user2@mail.com" > mail.tmp
echo "Cc: user3@mail.com,user4@mail.com" >> mail.tmp
echo "From: group@mail.com" >> mail.tmp
echo "Subject: my report" >> mail.tmp
echo "please see as attached"... (6 Replies)
Hi,
I need something unusual, I guess. I need to start a process, and if that process displays a specific error message, I need to kill that process and restart it.
Something like:
startprocess | grep -i "This is the specific error message" && kill $pidof(startprocess)
Explanation, I need... (4 Replies)
Hello, can someone help me how to find a word and 2 lines after it and then send the output to another file.
For example, here is myfile1.txt. I want to search for "Error" and 2 lines below it and send it to myfile2.txt
I tried with grep -A but it's not supported on my system.
I tried with awk,... (4 Replies)
I need to help to work this
Print everything between 2 patterns if grep is not found the search word
example
Detroit
orange
cat
bat
rat
apple
sed -n "/Detroit,/apple/p" d |grep chicago
output would be
Detroit
orange
cat
bat
rat (1 Reply)
Hello.
In bash, is there a way to trap error "file not found" when a script call another script which is not found; then abort.
Example ( part of script running with -x option set) :
+ return 0
+ RETURN_CODE=0
+ ]
+ /root/bin/200_yast_install/00_reset_yast_install
bash:... (5 Replies)
Hello,
one step in a shell script i am writing, involves Grep command to search a regular expression in a line an only print the string after the match
an example line is below
/logs/GRAS/LGT/applogs/lgt-2016-08-24/2016-08-24.8.log.zip:2016-08-24 19:12:48,602 ERROR... (9 Replies)
Discussion started by: Ramneekgupta91
9 Replies
LEARN ABOUT NETBSD
zegrep
ZGREP(1) BSD General Commands Manual ZGREP(1)NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files
SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...]
zegrep [grep-flags] [--] pattern [file ...]
zfgrep [grep-flags] [--] pattern [file ...]
DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1).
The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern
argument.
zegrep calls egrep(1), while zfgrep calls fgrep(1).
EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0.
SEE ALSO egrep(1), fgrep(1), grep(1), gzip(1), zcat(1)AUTHORS
Thomas Klausner <wiz@NetBSD.org>
BSD December 28, 2003 BSD