Connected to 192.168.1.10 (192.168.1.10) ------------------------------------- How can I get rid of "Connection closed by foreign host." ? Some more common use case command > /dev/null 2>&1 & run command in background, discard stdout and stderr command >> /path/to/log 2>&1 & run command and redirect stdout and stderr to briefly: all STDERR and STDOUT messages will be redirect to /dev/null share|improve this answer edited Oct 21 '14 at 13:14 slm♦ 167k40305474 answered Oct 21 '14 at 13:11 arash javan 25819 But so there's no performance difference or some such with 2>&- vs 2>/dev/null (other than that some "poorly" written programs don't undrestand 2>&- correctly)? –Det Apr 6 '13 at 14:38 1 have a peek at this web-site
Why were Native American code talkers used during WW2? share|improve this answer edited Jul 4 '14 at 21:51 jww 35.8k21113225 answered Apr 15 '13 at 23:01 dstonek 458823 add a comment| up vote 0 down vote I use >> /dev/null Not the answer you're looking for? The null device is a device file that discards all data written to it. http://askubuntu.com/questions/350208/what-does-2-dev-null-mean
The script does NOT run as root, which works because it removes the correct files but not the root-level stuff in directory2 (that I don't want to remove). Alphabet Diamond Genitive vs Ablative of Price How to explain centuries of cultural/intellectual stagnation? share|improve this answer edited Sep 26 '13 at 13:55 answered Sep 26 '13 at 8:38 Warren Hill 10.4k104463 add a comment| up vote 10 down vote In short, it redirects stderr What happens if the same field name is used in two separate inherited data templates?
Browse other questions tagged shell io-redirection file-descriptors csh portability or ask your own question. Does the Iron Man movie ever establish a convincing motive for the main villain? Disable Email By default cron jobs sends an email to the user account executing the cronjob. Redirect Stderr To Dev Null And Stdout To File By default, if you don’t name or number one explicitly, you’re talking about STDOUT.
Why were Native American code talkers used during WW2? User contributions on this site are licensed under the Creative Commons Attribution Share Alike 4.0 International License. So why does that also go to /dev/null? dig this I need help with redirecting errors to dev null ...
Adv Reply November 18th, 2009 #3 xx77aBs View Profile View Forum Posts Private Message Just Give Me the Beans! Redirect Stdin To /dev/null Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Trick or Treat polyglot If you're given an hour, is it bad to finish a job talk in half an hour? Join Date Aug 2008 Beans 47 Re: Redirecting stderr to dev null ??
So… I tried to redirect the stderror & stdout to /dev/null this way: rm * /directory1/directory2/ > 2&>1 /dev/null kept changing /dev/null form a special file & other users need crw-rw-rw- http://www.cyberciti.biz/faq/how-to-redirect-output-and-errors-to-devnull/ more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Redirect Stdout And Stderr To Dev Null more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed /dev/null 2 &1 In Linux Reply Link Hugues November 12, 2013, 4:33 pm l often do the following and I do not want an error (just a 0 length file) You get a valid output if
It redirects file descriptor 2 (STDERR) and descriptor 1 (STDOUT) to /dev/null. >/dev/null This is just an abbreviation for 1>/dev/null. Check This Out DDoS: Why not block originating IP addresses? Exactly what i wanted! share|improve this answer answered Oct 21 '14 at 13:13 garethTheRed 16.2k23148 1 What if the command that I run in the crontab file do not output anything? & Dev Null
So, where is the wrong syntax? Equivalent for "Crowd" in the context of machines Limit Notation. It combines the output of file descriptors "M" and "N" into a single stream. |& This is just an abbreviation for 2>&1 |. Source share|improve this answer answered Jun 11 '15 at 10:57 UmayKnowMe 1113 add a comment| up vote -3 down vote This grep command has a wrong syntax, It should be something like
Sometimes they’re not named, they’re numbered! Draw an hourglass How do you say "enchufado" in English? You can also use >> to append. Redirect Stderr To Null Windows stdout) and file descriptor '2' is standard error (a.k.a.
Browse other questions tagged command-line grep stdout or ask your own question. Reply Link Security: Are you a robot or human? asked 3 years ago viewed 76211 times active 2 years ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Linked 0 What does this ls command do? 53 have a peek here Hot Network Questions The Rule of Thumb for Title Capitalization Why were Native American code talkers used during WW2?
Bitwise rotate right of 4-bit value Proving an equality in set theory What is way to eat rice with hands in front of westerners such that it doesn't appear to be See also rc for better designed operators. –Stéphane Chazelas Oct 24 '14 at 9:26 Update: about the performance issue, that's also confirmed here: unix.stackexchange.com/questions/163955/… –Det Apr 16 at 14:24 Disproving Euler proposition by brute force in C What's a Racist Word™? BashGuide | BashFAQ | BashPitfalls | Guide to Forum features | Please Mark Your Threads as [SOLVED] One must imagine Sisyphus happy.
RSS Feed. Standard input usually comes from the keyboard if it’s an interactive program, or from another program if it’s processing the other program’s output. I'm sure you have something in mind where both good and bad output would normally go to stdout. Problem is users get confused by the "permission denied" msgs output by the "rm".
What is the meaning of the 90/10 rule of program optimization? These 2 are equivalents: > file and >file. Browse other questions tagged shell posix io-redirection or ask your own question. Code Golf Golf Golf Save a JPG without a background Logical && statement with null validation Disproving Euler proposition by brute force in C Do I need to turn off camera
share|improve this answer answered May 9 '12 at 1:49 dasblinkenlight 459k39497847 17 Actually, 2>&1 actually redirects stderr to stdout. Delayed effects after player's death How to search for flights for a route staying within in an alliance? How could a language that uses a single word extremely often sustain itself? use: command 2>&1 1>/dev/null Reply Link nixCraft October 6, 2011, 12:54 am No, it does not matters.
The OP doesn't said nothing about this... crond -m off Now to the syntax: this is specific to the Bourne shell language (and its derivatives such as bash, zsh, and so on). [n]>file [n]>fd will redirect to file This answer seems to belong to another question. –sivann Sep 26 at 15:27 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using add a comment| 6 Answers 6 active oldest votes up vote 62 down vote accepted > is for redirect /dev/null is a black hole where any data sent, will be discarded
Problems with amsmath Does the Many Worlds interpretation of quantum mechanics necessarily imply every world exist? share|improve this answer edited Apr 3 '13 at 8:44 lesmana 9,15553857 answered Apr 3 '13 at 2:25 BriGuy 1,7081615 3 |& and &>/dev/null are not portable. –Chris Down Apr 3 It can be used to suppress any output. What is the meaning of the 90/10 rule of program optimization?