Cov txheej txheem:
Video: Yuav ua li cas nyob rau hauv bash parameters kis mus rau ib tsab ntawv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hla Kev Sib Tham mus rau Tsab ntawv . Kev sib cav tuaj yeem yog dhau mus rau tsab ntawv thaum nws raug tua, los ntawm kev sau lawv raws li qhov chaw-delimited daim ntawv teev npe tom qab tsab ntawv npe file. Hauv lub tsab ntawv , qhov $1 kuj sib txawv hais txog thawj kev sib cav hauv kab hais kom ua, $2 thib ob kev sib cav thiab lwm yam.
Tsis tas li ntawd, $ 1 yog dab tsi hauv bash tsab ntawv?
yog dab tsi $1 . $1 yog thawj commandline sib cav. Yog tias koj khiav./asdf.sh a b c d e, ces $1 yuav yog ib, $2 yuav yog b, thiab lwm yam. Nyob rau hauv shells nrog functions, $1 tuaj yeem ua haujlwm raws li thawj qhov kev ua haujlwm, thiab lwm yam.
Ib yam li ntawd, $ yog dab tsi? Bash? Bash yog ib qho kev hais kom ua processor uas feem ntau khiav hauv lub qhov rais ntawv qhov twg cov neeg siv hom lus txib uas ua rau ua. Bash tuaj yeem nyeem thiab ua cov lus txib los ntawm cov ntaub ntawv, hu ua lub plhaub ntawv. Bash yog POSIX-raws li lub plhaub, tab sis nrog ntau qhov txuas ntxiv.
Raws li txoj cai, koj ua li cas sau ib tsab ntawv bash?
Yuav ua li cas sau ib tsab ntawv bash uas siv cov neeg siv tswv yim
- Qhib cov ntaub ntawv tshiab. nano myscript.
- Sau cov kab shebang: #!/usr/bin/env bash.
- Sau cov ntawv sau. Cia peb ua haujlwm nrog ib qho piv txwv yooj yim:
- Ua kom tsab ntawv executable. chmod + x myscript.
- Khiav tsab ntawv../myscript.
- Ntxiv ib qho kev hloov pauv. #!/usr/bin/env bash.
- Tam sim no khiav nws: Tsis muaj qhov xav tau parameter:
- Ntxiv ib qho kev xaiv input variable.
$$ Linux yog dab tsi?
Raws li lub operating system, Linux yog software uas zaum hauv qab tag nrho lwm cov software hauv lub computer, tau txais kev thov los ntawm cov kev pab cuam thiab xa cov kev thov no mus rau lub khoos phis tawj kho vajtse.
Pom zoo:
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