Faster command for file copy than cp ? Post: 302588156

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

command faster in crontab..

Hi all you enlightened unix people, I've been trying to execute a perl script that contains the following line within backticks: `grep -f patternfile.txt otherfile.txt`;It takes normally 2 minutes to execute this command from the bash shell by hand. I noticed that when i run this command...

2. Shell Programming and Scripting

How to make copy work faster

I am trying to copy a folder which contains a list of C executables. It takes 2 mins for completion,where as the entire script takes only 3 more minutes for other process. Is there a way to copy the folder faster so that the performance of the script will improve?

3. UNIX for Dummies Questions & Answers

Which command will be faster? y?

i)wc -c/etc/passwd|awk'{print $1}' ii)ls -al/etc/passwd|awk'{print $5}'

4. Shell Programming and Scripting

HELP need to split this line faster than cut-command

Hi, A datafile containing lines such as below needs to be split: 500000000000932491683600000000000000000000000000016800000GS0000000000932491683600*HOME I need to get the 2-5, 11-20, and 35-40 characters and I can do it via cut command. cut -c 2-5 file > temp1.txt cut -c 11-20 file >...

5. Shell Programming and Scripting

faster command than find for sorting?

I'm sorting files from a source directory by size into 4 categories then copying them into 4 corresponding folders, just wondering if there's a faster/better/more_elegant way to do this: find /home/user/sourcefiles -type f -size -400000k -exec /bin/cp -uv {} /home/user/medfiles/ \; find...

6. Shell Programming and Scripting

Multi thread awk command for faster performance

Hi, I have a script below for extracting xml from a file. for i in *.txt do echo $i awk '/<.*/ , /.*<\/.*>/' "$i" | tr -d '\n' echo -ne '\n' done . I read about using multi threading to speed up the script. I do not know much about it but read it on this forum. Is it a...

7. Shell Programming and Scripting

Faster way to use this awk command

awk "/May 23, 2012 /,0" /var/tmp/datafile the above command pulls out information in the datafile. the information it pulls is from the date specified to the end of the file. now, how can i make this faster if the datafile is huge? even if it wasn't huge, i feel there's a better/faster way to...

8. UNIX for Dummies Questions & Answers

A faster equivalent for this sed command

Hello guys, I'm cleaning out big XML files (we're talking about 1GB at least), most of them contain words written in a non-latin alphabet. The command I'm using is so slow it's not even funny: cat $1 | sed -e :a -e 's/<*>//g;/</N;//ba;s/</ /g;s/>/...

9. Shell Programming and Scripting

Making a faster alternative to a slow awk command

Hi, I have a large number of input files with two columns of numbers. For example: 83 1453 99 3255 99 8482 99 7372 83 175 I only wish to retain lines where the numbers fullfil two requirements. E.g: =83 1000<=<=2000 To do this I use the following...

10. Shell Programming and Scripting

How to make awk command faster?

I have the below command which is referring a large file and it is taking 3 hours to run. Can something be done to make this command faster. awk -F ',' '{OFS=","}{ if ($13 == "9999") print $1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12 }' ${NLAP_TEMP}/hist1.out|sort -T ${NLAP_TEMP} |uniq>...

LEARN ABOUT REDHAT

shred

SHRED(1)								FSF								  SHRED(1)

NAME

       shred - delete a file securely, first overwriting it to hide its contents

SYNOPSIS

       shred [OPTIONS] FILE [...]

DESCRIPTION

       Overwrite the specified FILE(s) repeatedly, in order to make it harder for even very expensive hardware probing to recover the data.

       Mandatory arguments to long options are mandatory for short options too.

       -f, --force
	      change permissions to allow writing if necessary

       -n, --iterations=N
	      Overwrite N times instead of the default (25)

       -s, --size=N
	      shred this many bytes (suffixes like K, M, G accepted)

       -u, --remove
	      truncate and remove file after overwriting

       -v, --verbose
	      show progress

       -x, --exact
	      do not round file sizes up to the next full block

       -z, --zero
	      add a final overwrite with zeros to hide shredding

       -      shred standard output

       --help display this help and exit

       --version
	      output version information and exit

       Delete  FILE(s) if --remove (-u) is specified.  The default is not to remove the files because it is common to operate on device files like
       /dev/hda, and those files usually should not be removed.  When operating on regular files, most people use the --remove option.

       CAUTION: Note that shred relies on a very important assumption: that the filesystem overwrites data in place.  This is the traditional  way
       to  do things, but many modern filesystem designs do not satisfy this assumption.  The following are examples of filesystems on which shred
       is not effective:

       * log-structured or journaled filesystems, such as those supplied with

	      AIX and Solaris (and JFS, ReiserFS, XFS, Ext3, etc.)

       * filesystems that write redundant data and carry on even if some writes

	      fail, such as RAID-based filesystems

       * filesystems that make snapshots, such as Network Appliance's NFS server

       * filesystems that cache in temporary locations, such as NFS

	      version 3 clients

       * compressed filesystems

       In addition, file system backups and remote mirrors may contain copies of the file that cannot be removed, and that will allow  a  shredded
       file to be recovered later.

AUTHOR

       Written by Colin Plumb.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The full documentation for shred is maintained as a Texinfo manual.  If the info and shred programs are properly installed  at  your  site,
       the command

	      info shred

       should give you access to the complete manual.

shred (coreutils) 4.5.3 					   February 2003							  SHRED(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

command faster in crontab..

Discussion started by: silverlocket

2. Shell Programming and Scripting

How to make copy work faster

Discussion started by: prasperl

3. UNIX for Dummies Questions & Answers

Which command will be faster? y?

Discussion started by: karthi_g

4. Shell Programming and Scripting

HELP need to split this line faster than cut-command

Discussion started by: daytripper1021