03-07-2011
The one without the ampersand will write the output of standard error into a file named "1". Probably not what's intended.
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Hi,
suppose you have the following line at your crontab :
5 * * * * /usr/mine/script > /dev/null 2>&1
now i understood that the " > /dev/null 2>&1 outputs both Standard outpout and Standard Error messages to the /dev/null device or file...
the first part , " > /dev/null " transfers... (1 Reply)
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Hi ,
I am importing some table from /dev/null i dont understand what is /dev/null
Sorry i am new to UNIX
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hello all,
In many shell scripts i found '> /dev/null' , i am not able to get this,
will any one please explain why we are using this.
thanks
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Hi, Anyone can help
My solaris 8 system has the following
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All permission are lrwxrwxrwx
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Hi,
I am new into UNIX shell scripting and I am wondering what is the meaning of the below text which appears at the end of each line in the ".sh" file:
> /dev/null 2>&1
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Does >/dev/null 2>&1 and 2>&1 >/dev/null mean the same? (4 Replies)
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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:
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Hello All and a Happy New year to yous guys.
I'm running the below command on my AIX box and it keeps giving me the message that the file doesn't exist. I know the file don't exist, but I don't want to see the error. 2>/dev/null doesn't work.
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Hello
Can I just remove/delete flile ?
rw-r--r-- 1 root system 2385088512 Jun 30 21:25 /dev/null 2>&1
size of this flile is 2274.75 m and fill up my filesystem:
Filesystem MB blocks Used Free %Used Mounted on
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Hello,
Does anyone know how to housekeeping the null 2>&1 file in /dev?
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makekey(1) General Commands Manual makekey(1)
NAME
makekey - generate encryption key
SYNOPSIS
DESCRIPTION
improves the usefulness of encryption schemes depending on a key by increasing the amount of time required to search the key space. It
reads 10 bytes from its standard input and writes 13 bytes on its standard output. The output depends on the input in a way intended to be
difficult to compute (i.e., to require a substantial fraction of a second).
The first eight input bytes (the input key) can be arbitrary ASCII characters. The last two (the salt) are best chosen from the set of
digits, and uppercase and lowercase letters. The salt characters are repeated as the first two characters of the output. The remaining 11
output characters are chosen from the same set as the salt and constitute the output key.
The transformation performed is essentially the following: the salt is used to select one of 4,096 cryptographic machines all based on the
National Bureau of Standards DES algorithm, but broken in 4,096 different ways. Using the input key as key, a constant string is fed into
the machine and recirculated a number of times. The 64 bits that come out are distributed into the 66 output key bits in the result.
is intended for programs that perform encryption (e.g., ed(1) and crypt(1)). Usually, its input and output will be pipes.
SEE ALSO
crypt(1), ed(1), passwd(4).
makekey(1)