03-25-2014
What exactly are you attempting or want to do?
What is your os?
what file system are you using?
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi All,
I just given $rm abc.pc, I don't have backup also.
is there any way to recover?
thanks in advance
krishna (3 Replies)
Discussion started by: krishna
3 Replies
2. Solaris
hi
i need to find all the files that r linked to the current file as i need to delete the file as well as few of its links :confused:
thnx in advance (1 Reply)
Discussion started by: livemyway
1 Replies
3. Filesystems, Disks and Memory
Right, a mate of mine screwed up today and deleted the entire contents of a directory and he really needs to get the files back. He's using Red Hat Enterprise Edition 4. The files were deleted using rm *. He can't remember if the hard drive was formatted using ext2 or ext3. Anybody have any idea... (0 Replies)
Discussion started by: Bacchus
0 Replies
4. UNIX for Dummies Questions & Answers
how is the location of inodes in the physical disk.
are they sequential like:
bootblock|superblock|inode1|inode2| ....| datablock1|datablock2|datablock3
or are they distributed among data blocks like:
bootblock|superblock|inode1|datablock1|inode2|datablock2|datablock3|inode3
|datablock4 (3 Replies)
Discussion started by: gfhgfnhhn
3 Replies
5. UNIX for Dummies Questions & Answers
Hi
Is there any way to restore files accidentally deleted in Unix
(other than rm -i) (10 Replies)
Discussion started by: misenkiser
10 Replies
6. UNIX for Advanced & Expert Users
Hi
Is there a way by which I can recover the last deleted file file from a folder.
OR
I had a file in a path .(i didnt notice the size at that time ) I tried ftp that file to my windows but got file of zero size.
I want to check whether the file was already empty when I tried ftping it... (1 Reply)
Discussion started by: pratim09
1 Replies
7. UNIX for Advanced & Expert Users
Hi,
In tcsh, I mistakenly deleted some files under a dir with rm *
Is there any way by which I can recover those files (without restoring to an earlier backup point) ?
I mean any command like undelete or anything similar (10 Replies)
Discussion started by: snowline84
10 Replies
8. UNIX for Advanced & Expert Users
How can i trace Inode structure and modify it in UNIX kernel?
We want to change the inode structure in the sense that we want to add a new field to the inode data structure. So we want to know how and where to trace inode (7 Replies)
Discussion started by: Group_Inode
7 Replies
9. Shell Programming and Scripting
Hi Everyone,
we are running rsync with --backup mode, Are there any rsync options to remove backup folders on successful deployment?
Thanks in adv. (0 Replies)
Discussion started by: MVEERA
0 Replies
10. SCO
Hi ,
I am using SCO openserver realease 3.2 and tried to test versioning on a directory with undelete -s . The command executes well but it is not creating any versions of the files in it. I have also setted versioning options via filesystem and then remounted it but of ... (0 Replies)
Discussion started by: dextergenious
0 Replies
LEARN ABOUT DEBIAN
blackhole
BLACKHOLE(4) BSD Kernel Interfaces Manual BLACKHOLE(4)
NAME
blackhole -- a sysctl(8) MIB for manipulating behaviour in respect of refused TCP or UDP connection attempts
SYNOPSIS
sysctl net.inet.tcp.blackhole[=[0 | 1 | 2]]
sysctl net.inet.udp.blackhole[=[0 | 1]]
DESCRIPTION
The blackhole sysctl(8) MIB is used to control system behaviour when connection requests are received on TCP or UDP ports where there is no
socket listening.
Normal behaviour, when a TCP SYN segment is received on a port where there is no socket accepting connections, is for the system to return a
RST segment, and drop the connection. The connecting system will see this as a ``Connection refused''. By setting the TCP blackhole MIB to
a numeric value of one, the incoming SYN segment is merely dropped, and no RST is sent, making the system appear as a blackhole. By setting
the MIB value to two, any segment arriving on a closed port is dropped without returning a RST. This provides some degree of protection
against stealth port scans.
In the UDP instance, enabling blackhole behaviour turns off the sending of an ICMP port unreachable message in response to a UDP datagram
which arrives on a port where there is no socket listening. It must be noted that this behaviour will prevent remote systems from running
traceroute(8) to a system.
The blackhole behaviour is useful to slow down anyone who is port scanning a system, attempting to detect vulnerable services on a system.
It could potentially also slow down someone who is attempting a denial of service attack.
WARNING
The TCP and UDP blackhole features should not be regarded as a replacement for firewall solutions. Better security would consist of the
blackhole sysctl(8) MIB used in conjuction with one of the available firewall packages.
This mechanism is not a substitute for securing a system. It should be used together with other security mechanisms.
SEE ALSO
ip(4), tcp(4), udp(4), ipf(8), ipfw(8), pfctl(8), sysctl(8)
HISTORY
The TCP and UDP blackhole MIBs first appeared in FreeBSD 4.0.
AUTHORS
Geoffrey M. Rehmet
BSD
January 1, 2007 BSD