/dev/null file issue Post: 302772382

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1. UNIX for Advanced & Expert Users

Has anyone seen this issue with the /dev/null?

hello all, I am working in a Hpux 11.0 64 bit environment. I am not sure if a third party software is doing this or not, but the admin to this server says it is not a server issue as he has check and double check logs and crons to verify this issue. My problem, is that every now and then, once...

2. UNIX for Dummies Questions & Answers

Creating a file / /dev/null

First of all, hello there cOmMuNity ! :cool: Well, I've got two basic questions: 1) In how many ways it's possible to create a file ? I know one manner using "touch", other typing something like echo "" > file ... The fact is that I need to overwrite the file if it exists, and touch...

3. UNIX for Advanced & Expert Users

Q1 :/dev/null Q2 -A

Hi, Q1-What does nroff -ms > /dev/null Q2- What does mean -A under STAT column : ps aux |head -20 UTIL PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND root 516 93,0 0,0 12 12 - A 04 nov 3906:51 wait Thank you.

4. Solaris

URGENT - setup port and dump all output to /dev/null or a file

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?

5. UNIX for Advanced & Expert Users

/dev/NULL can't open this file ??

when i write the following two statements : cp /dev/NULL /clocal/mqbrkrs/user/mqsiadm/sanjay/dspmq_temp cat /dev/NULL > /clocal/mqbrkrs/user/mqsiadm/sanjay/dspmq_temp its gives me errors like : cp: /dev/NULL: A file or directory in the path name does not exist. cat : /dev/NULL can't open...

6. Solaris

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7. UNIX for Dummies Questions & Answers

/dev/null 2>&1 Versus /dev/null 2>1

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

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/dev/null a file using xargs

Hi, I'm currently using the following command to wipe clean a log file which can't be straight out RM'd: cat /dev/null > server.log I'm building this into a script and I'm current working on a command to run on each machine to do this automatically however I have multiple files so I need...

9. Shell Programming and Scripting

Redirecting standard out to /dev/null goes to file "/dev/null" instead

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:...

10. AIX

Size of file /dev/./null 2>&1

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 /dev/hd4 2560.00 2558.59 1.41 100% /

LEARN ABOUT LINUX

mkdevmaps

mkdevmaps(1M)                                             System Administration Commands                                             mkdevmaps(1M)

NAME

       mkdevmaps - make device_maps entries

SYNOPSIS

       /usr/sbin/mkdevmaps

DESCRIPTION

       The  mkdevmaps  command  writes  to standard out a set of device_maps(4) entries describing the system's frame buffer, audio, and removable
       media devices.

       The mkdevmaps command is used by the init.d(4) scripts to create or update the /etc/security/device_maps file.

       Entries are generated based on the device special files found in /dev. For the different  categories  of  devices,  the  mkdevmaps  command
       checks for the following files under /dev:

       audio           /dev/audio, /dev/audioctl, /dev/sound/...
       tape            /dev/rst*, /dev/nrst*, /dev/rmt/...
       floppy          /dev/diskette, /dev/fd*, /dev/rdiskette, /dev/rfd*
       removable disk  /dev/dsk/c0t?d0s?, /dev/rdsk/c0t?d0s?
       frame buffer    /dev/fb

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+
       |Interface Stability          |Obsolete                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       allocate(1), bsmconv(1M), attributes(5)

NOTES

       mkdevmaps might not be supported in a future release of the Solaris operating system.

SunOS 5.10                                                          8 Oct 2003                                                       mkdevmaps(1M)

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Has anyone seen this issue with the /dev/null?

Discussion started by: oott

2. UNIX for Dummies Questions & Answers

Creating a file / /dev/null

Discussion started by: 435 Gavea

3. UNIX for Advanced & Expert Users

Q1 :/dev/null Q2 -A

Discussion started by: big123456

4. Solaris

URGENT - setup port and dump all output to /dev/null or a file

Discussion started by: frustrated1