Ungawenza kanjani umehluko ku-UNIX?
OKUGCINIWE: Ku-Unix, ngikusetha kanjani okuguquguqukayo kwendawo?
- Ku-sh , faka: VARNAME="value"; thekelisa i-VARNAME.
- Nge-ksh / bash , faka: thekelisa i-VARNAME=”value”
Uwengeza kanjani okuguquguqukayo kuShell?
Ungangeza kanjani okuguquguqukayo okubili kusikripthi segobolondo
- qalisa okuguquguqukayo okubili.
- Engeza okuhlukile okubili ngokuqondile usebenzisa i-$(…) noma ngokusebenzisa uhlelo lwangaphandle expr.
- Echo umphumela wokugcina.
Ungangeza kanjani okuguquguqukayo ku-Linux?
d, lapho uzothola khona uhlu lwamafayela asetshenziselwa ukusetha okuguquguqukayo kwendawo kulo lonke uhlelo.
- Dala ifayela elisha ngaphansi kwe/etc/profile. d ukugcina okuguquguqukayo kwemvelo yomhlaba jikelele. …
- Vula iphrofayela ezenzakalelayo kusihleli sombhalo. sudo vi /etc/profile.d/http_proxy.sh.
- Londoloza izinguquko zakho bese uphuma kusihleli sombhalo.
Ngiyengeza kanjani inombolo kokuguquguqukayo ku-UNIX?
Sebenzisa i-syntax elandelayo ukuze ubale isamba sezinombolo eziphelele ezimbili kusikripthi segobolondo:
- Kusetshenziswa umyalo we-expr onezicaphuni sum=`expr $num1 + $num2`
- Sebenzisa umyalo we-expr ofakwe kubakaki bese uqala ngophawu lwedola. isamba=$(expr $num1 + $num2)
- Lena indlela engiyithandayo yokuya ngqo ngegobolondo. isamba=$(($num1 + $num2))
Uyifunda kanjani i-variable ku-UNIX?
I-Shell inikeza indlela yokumaka okuguquguqukayo njengokufundwa kuphela usebenzisa umyalo wokufunda kuphela. Ngemva kokuthi okuguquguqukayo kumakwe njengokufunda kuphela, inani lakhona alinakushintshwa. /bin/sh: IGAMA: Lokhu kuhluka kufundwa kuphela.
UYINI ISETHI umyalo?
Umyalo we-SET uthi esetshenziselwa ukusetha amanani azosetshenziswa izinhlelo. … Ngemva kokuba iyunithi yezinhlamvu isisethiwe endaweni, uhlelo lohlelo lokusebenza kamuva lungafinyelela futhi lusebenzise lezi zintambo. Ukusebenzisa ingxenye yesibili yochungechunge olumisiwe (i-string2) uhlelo luzocacisa ingxenye yokuqala yochungechunge olumisiwe (string1).
Yini i-$? Ku-Unix?
I-$? okuguquguqukayo imele isimo sokuphuma somyalo odlule. Isimo sokuphuma siyinani lenombolo elibuyiswa yinoma yimuphi umyalo lapho uqedwa. … Isibonelo, eminye imiyalo ihlukanisa phakathi kwezinhlobo zamaphutha futhi izobuyisela amanani ahlukahlukene okuphuma kuye ngohlobo oluthile lokwehluleka.
Ungamisa kanjani okuguquguqukayo ku-bash?
Indlela elula yokusetha okuguquguqukayo kwemvelo ku-Bash iwukuba sebenzisa igama elingukhiye elithi "thekelisa" elilandelwa igama eliguquguqukayo, uphawu olulinganayo kanye nenani elizonikezwa indawo eguquguqukayo.
Yiziphi izinhlobo ezahlukene zokuguquguquka ezisetshenziswa kuskripthi segobolondo?
Igobolondo ingaba nezinhlobo ezimbili zokuguquguquka:
- Okuguquguqukayo kwemvelo - Okuguquguqukayo okuthunyelwa kuzo zonke izinqubo ezivezwa igobolondo. Izilungiselelo zabo zingabonwa ngomyalo we-env. …
- Okuguquguqukayo kweShell (kwasendaweni) - Okuguquguqukayo okuthinta kuphela igobolondo lamanje.
Ngikuthola kanjani okuguquguqukayo kwe-PATH ku-Linux?
Bonisa okuguquguqukayo kwemvelo yendlela yakho.
Uma uthayipha umyalo, igobolondo liwufuna kuzinkomba ezishiwo endleleni yakho. Ungasebenzisa i-echo $PATH ukuthola ukuthi yiziphi izinkomba igobolondo lakho elisethelwe ukuhlola amafayela asebenzisekayo. Ukwenza kanjalo: Thayipha i-echo $PATH ngomyalo womyalo bese ucindezela u-↵ Enter .
Iyini i-PATH eguquguqukayo ku-Linux?
I-PATH i okuguquguqukayo kwemvelo ku-Linux nakwezinye izinhlelo zokusebenza ezifana ne-Unix ezitshela igobolondo ukuthi yiziphi izinkomba okufanele ziseshe amafayela asebenzisekayo (okungukuthi, izinhlelo esezilungele ukuqhutshwa) ngokuphendula imiyalo ekhishwe umsebenzisi.
Ngikhipha kanjani okuhlukile ku-Linux?
Thumela Okuguquguqukayo
- vech=Ibhasi. Bonisa inani lokuguquguquka nge-echo, faka:
- echo “$vech” Manje, qala isibonelo esisha segobolondo, faka:
- bash. Manje, bonisa emuva inani le-vech eguquguqukayo ene-echo, faka:
- echo $vech. …
- thekelisa isipele=”/nas10/mysql” echo “Backup dir $backup” bash echo “Backup dir $backup” …
- thekelisa -p.