Specifying 2>/dev/null will filter out the errors so that they will not be output to your console. In more detail: 2 represents the error descriptor, which is where errors are written to. By default they are printed out on the console. > redirects output to the specified place, in this case /dev/null.
What is dev null 2 dev null?
2>&1 redirects standard phosong to standard output. &1 indicates file descriptor (standard output), otherwise (if you use just 1 ) you will redirect standard error to a file named 1 . [any command] >>/dev/null 2>&1 redirects all standard error to standard output, and writes all of that to /dev/null .
>/ dev null 2 >& 1 e bolelang?
So in a sentence “1>/dev/null 2>&1” after a command means, that every Standard Error will be forwarded to the Standard Output and this will be also forwarded to a black hole where all information is lost.
What is 2 >/ dev null in bash?
The N> syntax ho Bash e bolela ho tsamaisa tlhaloso ea faele sebakeng se seng. 2 ke tlhaloso ea faele ea stderr , 'me mohlala ona o e khutlisetsa ho /dev/null . Se boleloang ke sena ka mantsoe a bonolo: hlokomoloha tlhahiso ea phoso ho tsoa ho taelo.
What does dev null mean in Linux?
/dev/null ke faele e se nang thuso. Ntho leha e le efe e ngotsoeng ho eona ea lahloa. Hammoho li bolela “lahla melaetsa efe kapa efe ya phoso".
Can I read from dev Null?
U ngolla /dev/null nako le nako ha u e sebelisa ka taelo e kang touch file 2> /dev/null. U bala ho tloha / dev/null nako le nako ha u tšolla faele e teng u sebelisa taelo e kang katse /dev/null> bigfile kapa feela > bigfile. Ka lebaka la tlhaho ea faele, u ke ke ua e fetola ka tsela leha e le efe; u ka e sebelisa feela.
Is writing to dev Null faster?
Haeba script kapa lenaneo le hlahisa lihlahisoa tse ngata, ka kakaretso, phokotso ya bongata ba tlhahiso e tla etsa hore dintho di tsamaye kapele. Phokotso e matla ka ho fetesisa e bonoang moleng oa taelo ke ho khutlisetsa ho /dev/null . Leha ho le joalo, sena se ka etsoa ka litsela tse sa tšoaneng ka liphello tse sa tšoaneng.
Is dev null a file?
To begin, /dev/null is a faele e khethehileng e bitsoang null device ho Unix systems. Colloquially e boetse e bitsoa "bit-bucket" kapa "blackhole" hobane hang-hang e lahla ntho leha e le efe e ngotsoeng ho eona 'me e khutlisa EOF ea ho qetela ha e baloa.
Taelo ea lefeela ke efe?
The null command ke taelo ea THEN kapa ELSE e sa lateloeng ke tlhaku ea ho ntšetsa pele taelo. Haeba THEN kapa ELSE e sa lateloe ke tlhaku e tsoelang pele kapa ke taelo rekotong e le 'ngoe, THEN kapa ELSE ha e hlahise ketso.
2 e bolela'ng ho Linux?
38. Tlhaloso ea faele 2 e emela phoso e tloaelehileng. (litlhaloso tse ling tse khethehileng tsa faele li kenyelletsa 0 bakeng sa tlhahiso e tloaelehileng le 1 bakeng sa tlhahiso e tloaelehileng). 2> /dev/null e bolela ho tsamaisa phoso e tloaelehileng ho /dev/null. /dev/null ke sesebelisoa se ikhethileng se lahlang tsohle tse ngotsoeng ho sona.
What does 2 >> mean?
&1 e sebelisetsoa ho supa boleng ba tlhaloso ea faele 1 (stdout). Joale ntlheng ea 2>&1 e bolela “Tsamaisetsa stderr sebakeng se le seng moo re lebisang stdout teng "
What is 2 NUL?
Standard output is going to nul and standard phosong output (file descriptor 2) is being sent to standard output (file descriptor 1) so both error and normal output go to the same place. In Windows, nul is a null device, which means the output is just flushed and you don’t see it.
How do I send a message to dev Null?
In Unix, how do I redirect error messages to /dev/null? You can send output to /dev/null, by using taelo >/dev/null syntax. Leha ho le joalo, sena se ke ke sa sebetsa ha taelo e tla sebelisa phoso e tloaelehileng (FD # 2). Kahoo o hloka ho fetola>/dev/null ka tsela e latelang ho tsamaisa tlhahiso le liphoso ho /dev/null.