All Questions
14
questions
1
vote
1
answer
480
views
dd + gz = Even Worse /// Mount Valid Partition of Whole-Disk dd Image
I've got a 250G backup of a whole disk via dd, which was then piped to gz, thanks to the advice of one of my -genius- friends.
Looks like the EFI boot partition was corrupted (pretty sure it's an ...
- 11
1
vote
1
answer
447
views
recompressing .gz and .bz2 files to attain the same hash/checksum (mod timestamps?)
i want to duplicate the entire contents of wikimedia's dumps, monthly, and upload them to amazon glacier and/or tape backup and/or a third backup medium that can survive corporation collapse/...
- 23
1
vote
1
answer
2k
views
DD image smaller than drive copied
I took a backup of my server's OS disk through a live USB. Using the command:
dd if=/dev/sda bs=512 count=(30 gb worth of sectors) conv=noerror,sync status=progress | gzip -c > /path/to/removable/...
- 13
1
vote
1
answer
1k
views
Looking for the best way to backup and restore a directory of sparse files
We have a directory of sparse files (du returns 240M for one of these files; ls returns 960M).
When we copy one of these files over to S3, we end up uploading the entire 960M, and on downloading ...
- 870
1
vote
1
answer
630
views
Reading ZFS snapshots from tape is slow
I backed up my a zfs snapshot to tape using
zfs send tank/vertex@2017-01-20 | pv -cCTrbB 1g | pigz -c | pv -cCTrbB 1g | dd of=/dev/nst0 bs=1M
and then read it back using
dd if=/dev/nst0 bs=1M | pv -...
- 383
1
vote
1
answer
2k
views
How can I restore a MySql database dump direct from S3?
I have a gzipped database backup stored on S3 and would like to restore it to MySql without having to first download it due to disk space constraints. I tried the two commands below but got gzip: ...
- 147
2
votes
1
answer
143
views
How to Tar/GZip just the files folders in the data directory?
I have a bunch of folders and files in /usr/local/bin/data that I want to tar.gz.
I have a bash script that sets the source folder to backup src='/usr/local/bin/data/*
When I open up the .tar.gz ...
- 141
4
votes
1
answer
2k
views
Using dd to backup disk to same disk
I've tried using dd to back up my computer's hard drive, but I met with some rather confusing results. I've seen on multiple sources (e.g.: http://www.backuphowto.info/linux-backup-hard-disk-clone-dd,...
- 211
0
votes
2
answers
998
views
Incorrect size of image file made with dd and gzip?
In the past I made a backup of a partially full partition with dd if=/dev/sda1 | gzip -5 > file.gz. Some time later, when a free space on partition was smaller I made an image file again with the ...
- 1
1
vote
0
answers
98
views
canot restore disk image with dd (target part filled with zero)
I have a RAID0 disk before, now I want change the size of it.
From the manual, the only way is backup data, delete RAID, re-create with new size, and restore data.
now I have many old 2.5" hdd, each ...
- 43
88
votes
4
answers
76k
views
Why is piping 'dd' through gzip so much faster than a direct copy?
I wanted to backup a path from a computer in my network to another computer in the same network over a 100 Mbit/s line. For this I did
dd if=/local/path of=/remote/path/in/local/network/backup....
- 1,500
0
votes
2
answers
5k
views
Estimate compressed file size in tar.gz
I've got a set of .tar.gz files, which are duplicity backup files (either full backups or incremental ones). I'd like to compute which directories take the most space on backups. This will most ...
- 3,318
0
votes
2
answers
12k
views
uncompress gzipped encrypted file
I have got a backfile with extension .tar.gz.enc. After fooling around I found out that it is encrypted gzipped tarball.
Now I want know how to decrypt it.
- 1,417
1
vote
2
answers
3k
views
Help on writing Linux script to backup and ftp files to another server
I am using MySQL as the database system for my application on a Linux system. Every week I update the system and take backups (mysqldump) of the databases changed (2 databases). I then .tar.gz them ...
- 13