I am using a DEC ALPHA running Digital UNIX (formly DEC OSF/1) and ksh. I have a directory with hundreds of files that only share the extension .rpt. I would like to search that directory based on serial number and operation number and only files that meet both requirements to be printed out. I... (6 Replies)
Hi,
I really need some help with GREP searching...
I need to find all occurances of a file reference and remove two characters from the end of the reference. For example, here are a few lines showing the text:
<image file="STRAIGHT_004CR.jpg" ALT="STRAIGHT_004CR.jpg" />
<image... (8 Replies)
Hi,
i have a file called alert_pindb.log i need to grep and count for all the lines starting with "ORA-" but i need to exclude the line which is having "ORA-00600
"
i am using following syntax to count the ORA- nos
"grep \"ORA-\" alert_pindb.log | wc -l";
since ORA- may be anything... (9 Replies)
I am making a script but having little problem. at one part I need to find one number format or other format from a file..
those formats are xxx-xx-xxxx or xxxxxxxxx
i tried
grep '( \{3\}-\{2\}-\{3\} |\{9\})'
if i do them sepratly it work but like this it is not working
Please check... (7 Replies)
Hi all,
I just want to find all values that are in a specified interval. I tryed it with grep e- file , it does not work.
Is it possible to get values wich are lower a special number, like grep >e-18 file?
Thanks a lot (4 Replies)
I use this command to find a search (Nr of active alarms are) and print one line before and 10 lines after the search keywords.
nawk 'c-->0;$0~s{if(b)for(c=b+1;c>1;c--)print r;print;c=a}b{r=$0}' b=1 a=10 s="Nr of active alarms are:" *.log
However, I would like to know how to tell it to print... (3 Replies)
I'm attempting to use grep in Perl with very little success.
What I would like to do in Perl is get the output of the following grep code:
grep -l 'pattern' *
This gives me a list of all the files in a directory that contain the pattern that was searched.
My attempts to do this in Perl... (4 Replies)
I am performing a regular check on UNIX servers which involves logging onto UNIX servers and using the grep command to check if a GID exists in the /etc/group directory
e.g. grep 12345 /etc/group
I have five to check on each server, is there anyway I can incorporate them into one command and... (2 Replies)
Hi,
I want to grep multiple patterns from multiple files and save to multiple outputs. As of now its outputting all to the same file when I use this command.
Input : 108 files to check for 390 patterns to check for. output I need to 108 files with the searched patterns.
Xargs -I {} grep... (3 Replies)
I am new to unix and I would like to search multiple log files to find earliest occurrence of a text.
Ex:
Say I have 10 logs file each ending with .log and I want to find the text “CustomeError” .
I want to find the which log file “CustomeError” comes first and lines which surround’s ... (4 Replies)
Discussion started by: jim john
4 Replies
LEARN ABOUT NETBSD
flock
FLOCK(1) BSD General Commands Manual FLOCK(1)NAME
flock -- Provide locking API for shell scripts
SYNOPSIS
flock [-dnosvx] [-w timeout] lockfile|lockdir [-c command] | [command ...]
flock [-dnsuvx] [-w timeout] lockfd
DESCRIPTION
The flock utility provides flock(2) access to the command line or scripts. The first form locks a file or directory while the command pro-
vided is executed. If the file or directory does not exist, then a file is created.
The second form can use an arbitrary file descriptor that is provided from a shell script for example:
(
flock -s 100
# commands to be executed under the lock
) 100> /path/to/lockfile
The following options are available:
-c command Pass a command to a the shell.
-d, --debug Provide debugging output.
-n, --nb, --nonblock
Don't block and fail immediately if the lock could not be obtained.
-o, --close Close the file before executing the command. This is useful if the child forks and should not be holding the lock.
-s, --shared Obtain a shared lock.
-u, --unlock Unlock an existing lock. This is available only for a file descriptor.
-v, --verbose On error print an explanation of the failure.
-w, --wait, --timeout seconds
Fail if the lock could not be obtained after seconds.
-x, --exclusive Obtain an exclusive lock.
EXIT STATUS
The flock utility exits 0 on success, and >0 if an error occurs.
SEE ALSO shlock(1), flock(2)HISTORY
An flock utility appeared in NetBSD 6.1.
BSD November 2, 2012 BSD