G'day all
Just wondering if anyone can help me, is it possible, within a Bourne Shell script, to check if a entered file exists? :confused:
An example would be (And this is the reason why I'm asking) If I was to write a super-basic backup script, and the user entered a filename, what sort of... (2 Replies)
now, what do you define as core files.
there are some files outthere with the name perl.core, I-core.png, core.png
I mean, are these classified as core files too??? i thought core files are simply files called "core". Please help me out
this is urgent (2 Replies)
Hi
i am trying to read a line from a file and add the values in a new file
eg
Input file
a1|a2|a3|a4|a5|a6
b1|b2|b3|b4|b5|b6
c1|c2|c3|c4|c5|c6
expected output
File one
a1|a2|a3
b1|b2|b3
c1|c2|c3 (3 Replies)
I want to grep "abc" from "logyy". I want not only the instance of "abc" to return, but the line just above it as well (no matter what it is).
:)
Can some one please assit me to drive on this (2 Replies)
I have sunfire question and getting the following error message through prtdiag.
MB/P0/F0 RS failed 0 rpm
What it means? Please help me ASAP. (2 Replies)
I have a make_recovery tape, if I restore the VG00 volume group using this, will my other volume groups still be ok after the restore(I have 7 data volume groups)
I used make_recovery -A to create the tape
I have a HP9000 HP-UX 11
An internal disk is failing, the other volume groups are on... (3 Replies)
I have a file like below. I need from each group of messages only first lines after error. Could you pleasde help me to write a correct program?
expected output is like this "Error 126614 in debt instrument header for debt instrument ID 10115537: The
rating reason RATING AFFIRMED selected for... (1 Reply)
Discussion started by: digioleg54
1 Replies
LEARN ABOUT DEBIAN
plan9-grep
GREP(1) General Commands Manual GREP(1)NAME
grep, g - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
g [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines that match the pattern, a regular expression as defined in regexp(7) with
the addition of a newline character as an alternative (substitute for |) with lowest precedence. Normally, each line matching the pattern
is `selected', and each selected line is copied to the standard output. The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-e The following argument is taken as a pattern. This option makes it easy to specify patterns that might confuse argument parsing,
such as -n.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
-f The pattern argument is the name of a file containing regular expressions one per line.
-b Don't buffer the output: write each output line as soon as it is discovered.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'. An expression starting with '*' will treat the rest of the expression as literal characters.
G invokes grep with -n and forces tagging of output lines by file name. If no files are listed, it searches all files matching
*.C *.b *.c *.h *.m *.cc *.java *.cgi *.pl *.py *.tex *.ms
SOURCE
/src/cmd/grep
/bin/g
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(7)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)