04-12-2011
If it's truncated, you probably can't by normal means. You'll need to use disk-level data recovery tools and even then it's not a sure thing. Stop writing to the filesystem, for starters. What is your system? What is your filesystem?
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1. Shell Programming and Scripting
Hello,
I need to truncate a large file without deleting and touching it again.
i tried the below commands but no use because of the huge file size
cat <<! > errors
and
echo > errors
Could someone please help.
Thanks,
Sateesh (1 Reply)
Discussion started by: kotasateesh
1 Replies
2. Shell Programming and Scripting
I have one file which first line is blank and second line has some data.
$cat filename
output:
30-MAY-07
I want to store 30-MAY-07 value in one variable.
for that I wrote
var="`head -2 filename`"
It will give that result but I want to truncate the first line which is blank.
plz help. (2 Replies)
Discussion started by: rinku
2 Replies
3. Shell Programming and Scripting
Hi All,
I have an application which writes log in to a file. The file size becomes around min of 800 MB a day. So I have written a script which backup the file and truncate the original file. My script is like this
cp X.log /backup/X.log1
> X.log
But the second truncate command... (3 Replies)
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3 Replies
4. UNIX for Dummies Questions & Answers
I am trying to concatenate 2 files, but before concatenation, I would like to strip off the final character from the first file.
The final character is a form feed (ascii 012 / hex 0C) and there will be an unknown number of these characters in the file. It is only the very last one which I want... (1 Reply)
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5. Shell Programming and Scripting
Hi,
I have files with names like file1.txt.txt.txt.txt and file2.txt.txt.txt.txt.txt............ (random infinite number of .txt exist).
how to truncate (mv) their names to ones with single .txt extension like file1.txt and file1.txt ? In other words, how to extract the filename upto first... (12 Replies)
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6. Shell Programming and Scripting
Hi all,
i have a file and i want that after 6th slash "/" in each line of the file the contents gets truncated.
Can anyone tell me how to do that !!
thanks in advance
One more thing how can i change the size of output buffer of console,
as i had very long output and its not... (2 Replies)
Discussion started by: glamo_2312
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Folder of e-mails in maildir format had been corrupted. Typical file name is 1246281161.6777.m21JH:2,S . The " :2,S prevents " copying to another device. How can I simply remove the last four characters? (2 Replies)
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8. Shell Programming and Scripting
Hello all.
I would like to make a script (or two shell scripts) that will do the following.
I need the maximum file name and directory name to be 38 characters long.
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9. Shell Programming and Scripting
how to recover the file in unix.
Thanks in advance.:wall: (1 Reply)
Discussion started by: krbala1985
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LEARN ABOUT DEBIAN
xfs_freeze
xfs_freeze(8) System Manager's Manual xfs_freeze(8)
NAME
xfs_freeze - suspend access to an XFS filesystem
SYNOPSIS
xfs_freeze -f | -u mount-point
DESCRIPTION
xfs_freeze suspends and resumes access to an XFS filesystem (see xfs(5)).
xfs_freeze halts new access to the filesystem and creates a stable image on disk. xfs_freeze is intended to be used with volume managers
and hardware RAID devices that support the creation of snapshots.
The mount-point argument is the pathname of the directory where the filesystem is mounted. The filesystem must be mounted to be frozen
(see mount(8)).
The -f flag requests the specified XFS filesystem to be frozen from new modifications. When this is selected, all ongoing transactions in
the filesystem are allowed to complete, new write system calls are halted, other calls which modify the filesystem are halted, and all
dirty data, metadata, and log information are written to disk. Any process attempting to write to the frozen filesystem will block waiting
for the filesystem to be unfrozen.
Note that even after freezing, the on-disk filesystem can contain information on files that are still in the process of unlinking. These
files will not be unlinked until the filesystem is unfrozen or a clean mount of the snapshot is complete.
The -u flag is used to un-freeze the filesystem and allow operations to continue. Any filesystem modifications that were blocked by the
freeze are unblocked and allowed to complete.
One of -f or -u must be supplied to xfs_freeze.
NOTES
A copy of a frozen XFS filesystem will usually have the same universally unique identifier (UUID) as the original, and thus may be pre-
vented from being mounted. The XFS nouuid mount option can be used to circumvent this issue.
In Linux kernel version 2.6.29, the interface which XFS uses to freeze and unfreeze was elevated to the VFS, so that this tool can now be
used on many other Linux filesystems.
SEE ALSO
xfs(5), lvm(8), mount(8).
xfs_freeze(8)