Nrhiav thiab hloov cov ntawv hauv ib cov ntaub ntawv siv sed command
- Siv Stream Editor (sed) raws li hauv qab no:
- sed -i 's/old-text/new-text/g' input. …
- Tus s yog qhov hloov pauv ntawm sed nrhiav thiab hloov.
- Nws qhia sed kom pom txhua qhov tshwm sim ntawm 'cov ntawv qub' thiab hloov nrog 'cov ntawv tshiab' hauv cov ntaub ntawv muaj npe nkag.
Yuav siv li cas hauv sed?
Sed Command hauv Linux / Unix nrog piv txwv. SED cov lus txib hauv UNIX yog sawv cev rau kwj editor thiab nws tuaj yeem ua haujlwm ntau ntawm cov ntaub ntawv xws li, tshawb nrhiav, nrhiav thiab hloov, ntxig lossis tshem tawm. Txawm hais tias feem ntau siv SED cov lus txib hauv UNIX yog rau hloov lossis nrhiav thiab hloov
Puas sau rau ua ntaub ntawv?
Sed muab "w" hais kom sau cov qauv chaw cov ntaub ntawv rau cov ntaub ntawv tshiab. Sed tsim lossis txiav lub npe filename ua ntej nyeem thawj kab nkag thiab nws sau tag nrho cov ntais ntawv rau ib daim ntawvyam tsis tau kaw thiab rov qhib cov ntaub ntawv.
Yuav ua li cas kuv txuag sed tso zis rau ib cov ntaub ntawv?
Txhua yam koj yuav tsum tau ua yog sed '' file > newfile thiab koj yuav pom tias > tuaj yeem siv tau tiag tiag nrog sed ib yam li nrog rau lwm qhov program.
Puas sed overwrite cov ntaub ntawv?
By default sed tsis overwrite the original file; nws sau rau stdout (li no cov txiaj ntsig tuaj yeem raug xa rov qab siv lub plhaub tus neeg teb xov tooj > raws li koj tau pom).
