Just as the output of a command can be redirected to a file, so can the input of a command be redirected from a file. As the greater-than character > is used for output redirection, the less-than character < is used to redirect the input of a command.
Yuav ua li cas kuv redirect tso zis ntawm ib tug hais kom ua nyob rau hauv Unix?
Option One: Redirect Output to a File Only
To use bash redirection, you run a command, specify the > or >> operator, thiab mam li muab txoj hauv kev ntawm cov ntaub ntawv koj xav kom cov zis redirected rau. > redirects cov zis ntawm cov lus txib rau ib cov ntaub ntawv, hloov cov ntsiab lus uas twb muaj lawm ntawm cov ntaub ntawv.
How do I redirect output in Linux?
Sau:
- command > output.txt. Tus qauv tso zis kwj yuav raug xa mus rau cov ntaub ntawv nkaus xwb, nws yuav tsis pom nyob rau hauv lub davhlau ya nyob twg. …
- command >> output.txt. …
- command 2> output.txt. …
- command 2 >> output.txt. …
- command &> output.txt. …
- txib &>> output.txt. …
- lus txib | tee output.txt. …
- lus txib | tee -a output.txt.
Koj redirect tso zis li cas?
Ntawm kab hais kom ua, redirection yog cov txheej txheem ntawm kev siv cov tswv yim / tawm ntawm cov ntaub ntawv lossis cov lus txib kom siv nws los ua ib qho kev tawm tswv yim rau lwm cov ntaub ntawv. Nws zoo sib xws tab sis txawv ntawm cov kav dej, vim nws tso cai rau kev nyeem / sau los ntawm cov ntaub ntawv tsis yog cov lus txib xwb. Redirection yuav ua tau los ntawm siv cov neeg ua haujlwm> thiab >> .
How do I redirect standard output to a file?
Another common use for redirecting output is redirecting only stderr. To redirect a file descriptor, we use N> , where N is a file descriptor. If there’s no file descriptor, then stdout is used, like in echo hello > new-file .
Which command will transfer the content of multiple files?
cov cat (short for “concatenate“) command is one of the most frequently used commands in Linux/Unix-like operating systems. cat command allows us to create single or multiple files, view content of a file, concatenate files and redirect output in terminal or files.
Qhov tso zis redirection yog dab tsi?
Output redirection yog siv los tso zis ntawm ib qho kev hais kom ua rau hauv cov ntaub ntawv lossis rau hauv lwm cov lus txib.
Dab tsi yog input thiab output redirection hauv Linux?
Input and output redirection is a technique used in order to redirect/change standard inputs and outputs, essentially changing where data is read from, or where data is written to. For example, if I execute a command on my Linux shell, the output might be printed directly to my terminal (a cat command for example).
Yuav ua li cas yog tias kuv thawj redirect stdout rau ib cov ntaub ntawv thiab ces redirect stderr rau tib cov ntaub ntawv?
Thaum koj redirect ob tus qauv tso zis thiab tus qauv yuam kev rau tib cov ntaub ntawv, koj yuav tau txais qee qhov kev xav tau. Qhov no yog vim qhov tseeb tias STDOUT yog cov kwj dej tsis txaus thaum STDERR ib txwm tsis muaj kev cuam tshuam.
Which symbol should I use to redirect the error output to the standard output?
The regular output is sent to Standard Out (STDOUT) and the error messages are sent to Standard Error (STDERR). When you redirect console output using the “>” symbol, you are only redirecting STDOUT. In order to redirect STDERR you have to specify “2>” for the redirection symbol.