However this only addresses the issue of not launching rm as a new process every time you delete a file. So with a large amount of files to delete this will be considerably quicker than using -exec in the find command.
Still an issue is not following sub directories and unintentionally deleting files there. So either only do this in a directory that has no sub directories (and never will have!), or learn about the prune function in the find command. There are plenty of posts here on the subject.
Hi all....I'm using awk to validate a csv file, but now I've been told to delete any invalid lines from the file.. Im not sure what the best way to do this is?
Would it be to create a temp file say "csv_temp.tmp" file and print all the valid records to that temp file. Then delete the old file... (3 Replies)
I am trying to print and delete at the same time 0KB files... using following command
a-> find . -type f | xargs ls -l | awk '{ if($5 == 0) {print $0;}}' | xargs rm $0
but am not successful. Can somebody tell me how to do this ... same time I need files to be printed as well deleted later.
... (4 Replies)
I have a file whose format is like the following
350,2,16.2,195,2,8.0
every 3rd column of this file should be deleted. How can i achieve this
tried with the following
iostat -D -l 2 | /usr/xpg4/bin/awk ' NR>2 { for (i=0;i<=NF;i++)if(i%3==0)$i=""};'
but no luck (3 Replies)
key pair is 1st and 6th column ex:a20 : p10 or a20 : p11
For every key pair if the vlaue(4th column) is the same then delete all the lines who has keypair and the value
ex: a20 : p10 has value 1 only then delete those but a20 : p11 has different values 1,2 and 3 and keep those.
input
a20 ... (8 Replies)
Hi Friends,
I am new to this , I am working on AIX system and my scenario is to retrive the files from remote system and remove the files from the remote system after retreving files. I can able to retrieve the files but Can't remove files in remote system. Please check my code and help me out... (3 Replies)
How Can we delete a range of coloumns using awk? (or any other method is fine)
If we have a file which has about 200 coloumns.
I need to delete a particular range lets say for eg from $6 to $119
Can we do this using cut, if yes the cut command would also be helpful.
many thanks in... (4 Replies)
Hi folks,
How awk 'll help to do this file contains bunch of insert statement like below remove fourth column from all statement put it in new file
INSERT INTO `tbl_medicalquestions` VALUES (1,'Is anyone waiting for an operation, post operative check up, any other hospital treatment or... (12 Replies)
#!/bin/bash
#
name=$1
type=$2
number=1
for file in ./**
do
if
then
filenumber=00$number
elif
then
filenumber=0$number
fi
tempname="$name""$filenumber"."$type"
if (4 Replies)
hello
I want to delete the lines of many files (e.g. file1, file2, ..., file1111) in my directory (e.g. dir1) that they have the 2nd column grater than a value (e.g. 40) placing them to a different directory (e.g. newdir) and keeping the originals. I wrote the code which is functional
awk '{... (3 Replies)
Discussion started by: phaethon
3 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)