We have some large files with sampling data in it. Don't want to delete these files. But want to quickly overwrite the file with 0s and/or 1s and preserve the original file size.
View 3 Repliessince arch has started using python3, bleachbit is broken, so i am looking for a system cleaner to replace it. i need something that will overwrite file contents and clear firefox cache + the all the normal functions of a system cleaner.
View 8 Replies View RelatedI'd like to change contents in a *.tgz file. I can uncompress (extract) using:
Code:
tar xzf archiv.tgz
and I get these 3 directories:
Code:
etc
install
usr
How to compress back to a tgz file?
Being new to this area .I have been assigned a task which i am unable to do . Can any one please help me .
I have requirement where i have input file XYZ_111_999_YYYYMMDD_1.TXT and with header and series of Numbers and Footer.
I want to create a mutiple output files with each file having a seperate code which is stored in text file and create XYZ_222_999_YYYYMMDD_1.TXT . and add date in the contents next to series of numbers .Like this
Before change the file looks like this
file name XYZ_111_999_YYYYMMDD_1.TXT
001,19SEP2009-14:05:05,000000003
1234
4567
6785
END_OF_DATA
[Code]....
i want to know why do we need to patch files based upon diff when we can directly overwrite the old file with the new file.
View 4 Replies View Relatedhave a gzip file ABC_000023232.gzipBCD_023232032.gzipI want to split these files into smaller files but keep the extension same because I am using this as a variable in a script
Code:
for i in `ls *.gzip`
split -b 500K $i $i
[code]...
Asuming I have two files, one large file and one small file, I want to write the smaller file to the large file without overwriting the remaining part of the larger file.
Both are binary files, and the large file can become very large, so I want to avoid copying the whole file, as that will take some time. Is there any standard Linux console utility to do this, or do I need to write it myself?
Are there software that can split big file size into small file size in Linux?
View 1 Replies View RelatedI want to be able to check the contents of a text file for a specific string and remove it from the file from the command prompt. I would basically be searching through a number of files and if a specific string is found I would like it removed automatically. pretty much a find and replace, were the replace is nothing. any one got any ideas on how you would do this. I already have the search part sorted just need to be able to remove the string I don't want from the multiple files.
View 4 Replies View RelatedI would like to know how I can replace a string in one file with the complete contents of another life.
View 10 Replies View RelatedI have two files list1.cfg and list2.cfg both files contains differentrecords details like
List1.cfg
NAME1:25:C:NAME LINE1:
NAME2:25:C:NAME LINE2:
CITY:25:C:City:
[code]....
Now I want to append contents list2.cfg to list1.cfg(It ispposible using cat list2.cfg >>list1.cfg) but I want to check if content of (record) in list2.cfg is present in list1.cfg then dont append it otherwise append it.
someone once told me that use can pass a file to grep and use that to search the contents of another file. if that is the case I'm not entirely sure why the following isn't working for me.
Code:
[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys
[root@LCENT01:~]#cat id_rsa.pub >> .ssh/authorized_keys
[root@LCENT01:~]#grep -i id_rsa.pub .ssh/authorized_keys
i am trying to write a bash script. i have a text file called comp2.tmp which has a list of items in it
example comp2.tmp
Code:
filename.pdf
filename2.zip
filename3.ttf
and so on
I have another text file called comp1.tmp which should have the same list of files in it, but does not look as pretty
example comp1.tmp
Code:
someothertext here ...... 10/30/2009 ...... filename.pdf
=========================------------------==============
othertextagain .......... 09/28/2008 ...... filename2.zip
========================------------------===============
bunchmoretext ........... 04/12/2005 ....... filename3.ttf
and so on
i would like to check if the filenames listed in comp2.tmp exists in comp1.tmp
I try to write to a file "date > file" but Linux says 'cannot overwrite existing file'. I tried chmod 755 but still cannot write to the file. What should I do?
View 2 Replies View RelatedI was doing a tutorial on scripting in bash. I saved my file on the desktop and I cannot seem to get to that file to execute it. Here is what I have been using:
I try cd Desktop says that there is no such directory.
I tried /home/me/Desktop same thing.
For example I want a file to be processed by sed, and then overwrite the file with sed's output. I would try this:
Code:
sed '<regex goes here>' myfile > myfile
But it doesn't work as expected, instead it empties the file (I am thinking that as the first byte comes out of sed, it overwrites the whole file and sed has nothing more to do). How can I make this work?
Code:
dd bs=8192 if=Image of=/dev/PS0
In the above command, I cant able to understand the option "of=/dev/PS0"
Whether it means,
1) to write the input file "Image" in to "/dev/PS0" of the Floppy device
or
2) to overwrite the same input file "Image" in a file format ("/dev/PS0") of Floppy.
I am curious if perhaps I am doing something wrong extracting pages from a pdf doc using pdftk and creating a new file. I am only extracting the odd pages from the file and outputting them to a new file that is now only 20 pages instead of the input's 40 pages, yet the new output file is still 1.4Mb in size, the same as the original.
It seems strange to extract only half the pages of a large document and end up with a result that is the same size. how to streamline the resulting pdf's using pdftk?
BTW this is the command I am using, in case perhaps I am missing an option to optimize file size or something:
Code:
pdftk A=ch15.pdf cat A1-40odd output odd.pdf
I'm researching about symbolic links been used with samba / CIFS:I'd like that the user that uses a MS-Windows OS could see my shared folder on CentOS 5 and the symbolic links that are inside this folder. Well, it works but, the user will see that the size of the file is bigger than the real file. Apparently, CIFS gets the size of the symbolic link (aproxim.32K) and add it to the size of the file.Example 1: 100KB file, used with shared folder, MS-Windows's user will see 100KBExample 2: 100KB file, used with symbolic link inside a shared folder, MS-Windows's user will see 132KB. (Sym link + size of file)Is there a way to allow the user only see the size of the file, and not the file + symbolic links ?
View 1 Replies View RelatedI was just testing specifying limit on file size to a user and have added the following to /etc/security/limits.conf bob soft fsize 100 This basically should have said not to allow bob to create anyfile greater than 100Kb in size.
But the interesting thing is, if bob already has any file which is greater than 100Kb in size, it even doesn't allow to log him into the system both from console and SSH. Also nothing is logged in logs.. How do I configure it so that, bob can login to the system even though he has any file greater than 100Kb (but doesn't allow him to create file which are greater than 100Kb) ??
I'm getting some funny behavior from ffmpeg when I'm trying to increase the volume of an mp3 file and have it overwrite itself. For example, if I execute the following command:
Code:
ffmpeg -i name.mp3 -vol 1024 -y name.mp3
it will code the first 5 seconds or so and then quit with:
Code:
[mp3 @ 0x2db16d0]incomplete frame
Error while decoding stream #0.0
[Code]....
I have written a spec file for packaging my application in an rpm, but it reports a conflict when I am trying to update my service script in /etc/init.d/. This is a file that I do need to update/replace so how might I force the rpm to do that?
Code:
Summary: A program that increases WAN performance.
Name: packetsqueezer
Version: 0.3.05
Release: 1
[code]...
I am using DD to backup entire system partitions and now I am trying to restore one. The resulting disk image from my buggy process has zero bytes. D'oh.It apparently thinks the image was trailing garbage and ignores it. It deletes the original file and replaces it with a zero byte .dd file. I have the original copy of the image in a dd.gz file. It's 6.3 GB so it may still contain the data.How do I get the original image back without destroying it again?
View 1 Replies View RelatedI've recently left Windows behind for good and have come to Linux (Ubuntu.) However, I've run into problems after trying to dual boot windows 7 and ubuntu. When I restarted my computer, I got a black screen with white text reading "Minimal BASH-like line editing is supported". I have the Ubuntu live cd and was able to try Ubuntu without having to install it, but after I put in a flash drive with Windows 7 on it, the Ubuntu CD has stopped working entirely.
The weird thing is, the computer that I installed Ubuntu on, already had Ubuntu and Windows 7 on it. And every OS was booting successfully. The reason I deleted the Ubuntu that was already on the computer, is because there were many different versions. I wanted to do a clean sweep and only have Ubuntu and Windows 7 installed on the computer. I know that if you try to dual boot Windows 7 and Ubuntu, Windows will overwrite the GRUB file, making it unable to dual boot.
My situation:
Host A: need sudo to access the file
Host B: need sudo to access/overwrite the target file
How to copy a file from host A to host B without creating temporaries? Is it possible?
is lvresize with --resizefs options re-size the Logical Volume and then re-size the file system? i mean we don't need to use resize2fs?I looked at man pages but it doesn't explain this option.
View 3 Replies View RelatedHow can we find the maximum size of the inode table and what decides it, and how the maximum size of volume of file system is decided ?
View 4 Replies View RelatedI want to see which file is changing in linux as a log file.
View 1 Replies View RelatedIn Ubuntu 10.04, there is a certain file that appears highlighted in terminal. When I try to cat the file, it says there is no such file or directory. How can I see what's in this file? Is this a symbolic link?
View 1 Replies View Relatedhow do I print out the contents of a file?
View 4 Replies View Related