For these kinds of logical statements I prefer the UNIX awk command since it actually has logical statements...
/NEW/ && (NR==1) would mean "print lines whenever the line matches the regex /NEW/, and NR ( line number ) equals 1". Putting a ! in front negates it, to print lines only when that's false.
How would I delete everything on a line in a file prior to a specific word?
In other words, I have a file that contains the word SEARCH on various lines and would like to delete everything prior to SEARCH on all lines. Thanks for that help (2 Replies)
Hi I have a text file like this name today.txt
the request has been accepted
the scan is successful at following time
there are no invalid packages
5169378 : map : Permission Denied
the request has been accepted
Now what i want do is
I want to search the today.txt file and
if i... (1 Reply)
Hi Canone please provide me solution how can achieve the result below:
File1.txt
$
sweet appleŁ1
scotish
green
$
This is a test1
$
sweet mangoŁ2
asia
yellow
$
This is a test 2
$
sweet apple red (there is no pound symbol here)
germany
green (1 Reply)
write a shell script that deletes all lines containing a specified word in one or more files supplied as arguments to it.help is appreciated .thank you. (2 Replies)
I'm new to using sed and grep commands, but have found them extremely useful. However I am having a hard time figuring this one out:
Delete every line containing the word CEN and the next line as well.
ie. test.txt
blue
324 CEN
green
red
blue
324 CEN
green
red
blue
to produce:... (2 Replies)
I have a line that gets pulled from a database that has a variable number of fields, fields can also be of a variable size. Each field has a variable number of spaces between them so there is no 'defined' delimiter. The LastData block is always a single word.
What I want to do is delete the... (2 Replies)
Hi,
I have gone through may posts and dint find exact solution for my requirement.
I have file which consists below data and same file have lot of other data.
<MAPPING DESCRIPTION ='' ISVALID ='YES' NAME='m_TASK_UPDATE' OBJECTVERSION ='1'>
<MAPPING DESCRIPTION ='' ISVALID ='NO'... (11 Replies)
I want to delete the last word of each line in all the files in one directory but dont know what I am doing wrong
FILES="data/*"
for X in $FILES
do
name=$(basename $X)
sed s/'\w*$'// $X > no-last/${name}
done
Can you please help me :wall: (8 Replies)
here is what i want to achieve.. i have a file with below contents
cat fileName
blah blah blah
.
.DROP this
REJECT that
.
--sport 7800 -j REJECT --reject-with icmp-port-unreachable
--dport 7800 -j REJECT --reject-with icmp-port-unreachable
.
.
.
more blah blah blah
--dport 3306... (14 Replies)
Hi Guys ,
I am having a file as stated below
File 1
sa0 -- i_core/i_core_apb/i_afe0_controller/U261/A
sa0 -- i_core/i_core_apb/i_afe0_controller/U265/Z
sa1 -- i_core/i_core_apb/i_afe0_controller/U265/A
sa1 -- i_core/i_core_apb/i_afe0_controller/U268/Z
sa1 -- ... (7 Replies)
Discussion started by: kshitij
7 Replies
LEARN ABOUT PLAN9
grep
GREP(1) General Commands Manual GREP(1)NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). 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.
-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.
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 '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(6)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)