Hey guys,
I'd like to delete all text within a text file without actually deleting the file. Is there a vi command I can do from my prompt without actually going into the file and doing a %d i think it is... to remove all the text inside?
I want to add this to a cron job to erase all the data... (2 Replies)
So, I have a file that has some duplicate lines. The file has a header line that I would like to keep at the top.
I could do this by extracting the header from the file, 'sort -u' the remaining lines, and recombine them. But they are quite big, so if there is a way to do it with a single... (1 Reply)
Hi Guys,
I have folder where the logs are generated (which is quite a few). I want to keep the recent n logs and delete the rest of them..
I am able to sort them by using ls -t.. but how to take it forward..
Can you people help me..
Thanks for the help in advance,
Regards,... (3 Replies)
Hi All,
I have too many .gz files (test.gz).
Task is to remove first line of each file.
Can I do it without unzipping the files?
Your help is appreciated. (4 Replies)
Dear Buddies,
Need ur help once again.
I have a flat file with around 20 million lines (Huge file it is). However, many of the lines are of no use hence I want to remove it. To find and delete such lines we have certain codes written at the starting of each line. Basis that we can delete the... (2 Replies)
Hi all,
I have a huge file(size more that 5GB).
I want to do some manupulation with the records and write to another file.
As the size of the file is huge and there is a space constraint in that directory, I want to delete that record from first file after writing it in to second file.... (3 Replies)
Hi
I have a file:
r58778.3|SOURCES={KEY=f665931a...,fw,221-705}|ERRORS={16_1:T,30_1:T,56_1:C,57_1:T,59_1:A,101_1:A,115:-,158_1:C,186_1:A,204:-,271_1:T,305:-,350_1:C,368_1:G,442_1:C,472_1:G,477_1:A}|SOURCE_1="Contig_1092402550638"(f665931a359e36cea0976db191ff60ff09cc816e)
I want to retain... (15 Replies)
file 1
abcde,dfgdfg,sdfds
sdfsd,sdfd,sdfg,sdfs
dwfds,sdfgdfg,sdfsdf
file2
1
3
i need to delete the line numbers file 1 based on file2
i have taken in loop file 1 and
i cant able to delete that line number in file 1
Plz help (4 Replies)
I'm trying to delete the blank lines from the file $Sfile. tried the below set of commands. Both are giving the same error (: bad interpreter: No such file or directory)
awk 'NF > 0' $Sfile > $Tfile
cat $Tfile
sed -i '/^$/d' $Sfile
cat $Sfile
Not sure if there's any other problem with... (17 Replies)
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)ZGREP(1)