I stumbled across a somewhat strange behavior of tar and find no explanation for it: i was testing a DVD for read errors and thought to simply tar the content and direct the output to /dev/null:
This way i expected the system to read the complete content and eventually to report a read error if there is one. To my amazement the command came back immediately without any error. Still i didn't believe it had read anything (save for maybe the directory information) so i directed the output to a real file instead.
This time tar did read the files and subsequently reported the read error i was expecting in one file.
My question is, why didn't it read the files before? Is there something i am missing?
Please help urgently.
I need to setup up some sort of service on a solaris server on a port.
I dont need it do anything special, anything that is sent to this port from an external server should be dump to /dev/null or a flat file..
Can you help urgently? (1 Reply)
Hi, Anyone can help
My solaris 8 system has the following
/dev/null , /dev/tty and /dev/console
All permission are lrwxrwxrwx
Can this be change to a non-world write ??
any impact ?? (12 Replies)
Hello,
I am working on a script to measure the read performance of a busybox environment. The logical choice is to use a command line like:
(time cp * /dev/null) 2> /tmp/howlong.txt
Ah, the rub is cp or /dev/null will only accept a single file at a time.
The result in the txt file is and... (1 Reply)
Hello,
I'm trying to send the error output of a 'cat' operation to /dev/null like this:
cat /dirA/dirB/temp*.log > /dirA/dirB/final.log 2>/dev/null
This works perfectly in a terminal, but not when placed in a script.
If there are no files matching temp*.log the script outputs an error... (7 Replies)
How are these two different? They both prevent output and error from being displayed. I don't see the use of the "&"
echo "hello" > /dev/null 2>&1
echo "hello" > /dev/null 2>1 (3 Replies)
I apologize if this question has been answered else where or is too elementary.
I ran across a KSH script (long unimportant story) that does this:
if ; then
CAS_SRC_LOG="/var/log/cas_src.log 2>&1"
else
CAS_SRC_LOG="/dev/null 2>&1"
fithen does this:
/usr/bin/echo "heartbeat:... (5 Replies)
I'm using an text-to-speech synthesis in a script, and I need to redirect it's output to /dev/null
how can I do that ? And how to redirect the stream to his normal output then (sound card ) ?
thankx (2 Replies)
Friends have the following problem
a search may not find anything which would correct example:
ls -ltr *prueba.txt | nawk '{ print $9 }' > Procesar.dat 2>/dev/null
When he finds nothing gives me the following error
ls: prueba.txt: No such file or directory
because 2> / dev / null... (4 Replies)
Discussion started by: tricampeon81
4 Replies
LEARN ABOUT DEBIAN
bup-join
bup-join(1) General Commands Manual bup-join(1)NAME
bup-join - concatenate files from a bup repository
SYNOPSIS
bup join [-r host:path] [refs or hashes...]
DESCRIPTION
bup join is roughly the opposite operation to bup-split(1). You can use it to retrieve the contents of a file from a local or remote bup
repository.
The supplied list of refs or hashes can be in any format accepted by git(1), including branch names, commit ids, tree ids, or blob ids.
If no refs or hashes are given on the command line, bup join reads them from stdin instead.
OPTIONS -r, --remote=host:path
Retrieves objects from the given remote repository instead of the local one. path may be blank, in which case the default remote
repository is used. The connection to the remote server is made with SSH. If you'd like to specify which port, user or private key
to use for the SSH connection, we recommend you use the ~/.ssh/config file.
EXAMPLE
# split and then rejoin a file using its tree id
TREE=$(tar -cvf - /etc | bup split -t)
bup join $TREE | tar -tf -
# make two backups, then get the second-most-recent.
# mybackup~1 is git(1) notation for the second most
# recent commit on the branch named mybackup.
tar -cvf - /etc | bup split -n mybackup
tar -cvf - /etc | bup split -n mybackup
bup join mybackup~1 | tar -tf -
SEE ALSO bup-split(1), bup-save(1), ssh_config(5)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-join(1)