El dd txib Nws suav hais tias yog ib qho ntawm cov khoom siv muaj zog tshaj plaws ntawm Linux. Txawm hais tias lub ntsiab lus ntawm cov ntawv no yog Cov Ntsiab Lus Txhais, ob "D" ua rau nws nquag tau txais cov npe zoo li nws yog "Disk shredder" o "Disk duplicator". Hauv kev muaj tiag, nws yog ib qho cuab yeej rau kev luam thiab hloov cov ntaub ntawv ntawm qib thaiv, txawm hais tias nws siv ntau dua.
Hauv tsab xov xwm no peb yuav los tshuaj xyuas txhua yam ntawm cov lus txib dd uas txhua tus neeg siv Linux yuav tsum paub, los ntawm lawv yooj yim syntax mus txog koj zoo tshaj plaws daim ntaub ntawv, suav nrog kev theej cov ntaub ntawv, thaub qab thiab rov ua dua disk faib, lossis tsim USB tsav bootable.
Nws yuav tsum tau hais cov lus txib dd Nws yuav tsum tau siv nrog ceev faj heev. Yog tias siv yam tsis tau ua tiav qhov kev pov thawj tsim nyog, nws yuav ua rau cov ntaub ntawv tsis tuaj yeem rov qab tau. Vim li no koj yuav tsum tau them nyiaj siab tshaj plaws thaum ua haujlwm nrog nws.
Hais kom meej syntax dd
Ntawm cov kev xaiv ntau tshaj plaws nyob rau hauv dd hais kom ua syntax, cov hauv qab no yuav tsum tau hais txog:
- bs = os: Txhawm rau txiav txim siab qhov loj ntawm qhov thaiv ntawd dd yuav nyeem lossis sau (piv txwv li, bs=4M).
- conv =: Qhia kom meej cov kev xaiv hloov dua siab tshiab.
- suav =: Txhawm rau teeb tsa tus naj npawb ntawm cov blocks ntawd dd yog yuav luam
- yog =: Cov ntaub ntawv lossis cov khoom siv nkag (cov ntaub ntawv tawm tswv yim).
- ntawm =: Cov ntaub ntawv lossis cov khoom tso tawm (tso zis ntaub ntawv).
- nrhiav =: Hla ib tus lej tshwj xeeb ntawm cov blocks lossis bytes thaum nyeem cov ntawv tso tawm.
- hla =: Hla ib tus lej tshwj xeeb ntawm cov blocks lossis bytes thaum nyeem cov ntaub ntawv nkag.
- status = kev vam meej: Qhia txog kev nce qib ntawm kev ua haujlwm hauv lub sijhawm.
Cov tswv yim siv cov lus txib dd
Cia peb saib qee qhov kev siv tswv yim ntxiv ntawm dd hais kom ua thiab yuav ua li cas rau lawv. Cov no tsuas yog qee qhov piv txwv ntawm kev siv ntau, txij li Nws qhov muaj peev xwm tiag tiag yog qhov dav dua:
Tsim cov duab disk
Qhov no yog ib qho ntawm feem ntau siv cov lus txib dd: tus tsim cov duab disk lossis faib cov duab, uas yog ua los ntawm kev luam ib me ntsis nws cov ntsiab lus. Muaj txiaj ntsig zoo rau kev tsim cov ntawv luam theej tawm. Hauv qhov piv txwv hauv qab no, qhov khoom siv yog origin.txt thiab ib qho ntawm qhov chaw, destination.txt.
sudo dd yog =/origin.txt of =/destination.txt
Clone disks
Ntawd yog, luam tag nrho cov ntsiab lus ntawm lub disk thiab txuag nws mus rau lwm qhov chaw. Ib qho piv txwv: luam tag nrho cov ntsiab lus ntawm lub disk sdaxnumx a sdaxnumx, koj yuav tsum siv cov lus txib raws li hauv qab no:
sudo dd yog =/sda1 ntawm =/sda2
Tsim ib tug bootable USB tsav
Lwm qhov kev siv ntawm cov lus txib dd yog qhov tsim bootable USB drives los ntawm ISO duab. Rau qhov no, nws yog qhov tsim nyog qhia cov ntaub ntawv ISO raws li cov ntaub ntawv nkag (yog) thiab USB tsav raws li cov ntaub ntawv tso zis (ntawm). Nov yog lwm qhov piv txwv:
sudo dd yog = linux_x.iso ntawm =/dev/sda bs=3M xwm txheej = kev vam meej
Hauv qhov no, linux_x.iso sawv cev rau ISO duab ntawm Linux faib, thaum / dev / sda Nws yog USB tsav. Tsis tas li ntawd, bs = 3M qhia peb qhov loj ntawm qhov thaiv (3 megabytes), thaum status = kev vam meej qhia txog kev nce qib ntawm cov lus txib. Qee zaum qhov kev nce qib no tshwm sim nrog cov duab ntawm lub bar.
Hla bytes lossis cov cim thaum nyeem cov ntaub ntawv nkag
Ntawm no yog ib qho piv txwv ntawm kev siv lub tshuab hluav taws xob Hla: hla tus lej tshwj xeeb ntawm bytes lossis cov cim thaum nyeem cov ntaub ntawv nkag. Nws yog siv thaum nws tsim nyog los tshem tawm qee qhov ntawm cov ntaub ntawv. Hauv qhov piv txwv no, thawj 200 khoom:
sudo dd if=abc.txt of=zyx.txt hla=200
Tshem tawm cov khoom thaiv
Thaum kawg, ib qho peev txheej uas yooj yim heev hauv qee qhov xwm txheej. Piv txwv li, thaum peb yuav tsum tau muag lossis xa mus rau ib qho disk rau ib tus neeg thiab peb xav kom paub tseeb tias nws cov ntsiab lus yav dhau los tsis tuaj yeem nkag mus tau. Lo lus nug ntawm ntiag tug. Qhov kev ua haujlwm no tau ua tiav los ntawm ob qho lus txib, raws li peb piav qhia hauv qhov piv txwv no:
sudo dd if=/dev/zero bs=1M of=/dev/sda
Thawj kauj ruam no txo cov ntaub ntawv uas twb muaj lawm ntawm lub cuab yeej mus rau qhov yooj yim sequence ntawm zeros. Txhawm rau ua kom tiav, koj yuav tsum sau tag nrho cov disk nrog random cov ntaub ntawv:
sudo dd if=/dev/random bs=1M of=/dev/sda
xaus
Hauv luv luv, peb tuaj yeem lees paub tias cov lus txib dd es ib qho cuab yeej tseem ceeb hauv Linux thaum nws los txog rau tej yam uas muaj feem xyuam rau luam, cloning thiab converting cov ntaub ntawv nyob rau theem qis. Ntawm ntau lwm yam, nws yog siv los tsim cov duab disk lossis kev nyab xeeb tu disks, raws li peb tau pom.
Lwm cov kev siv tswv yim yog los nthuav cov ntaub ntawv nyeem los ntawm cov lus txib dd, luam cov ntsiab lus los ntawm CD lossis DVD, ua ib nrab lossis tag nrho cov thaub qab, hloov cov ntawv loj rau cov ntawv me lossis lwm yam. Nws yeej tsim nyog kawm paub siv cov lus txib no.
Txawm li cas los xij, nws yog riam phom muaj zog uas koj yuav tsum paub yuav ua li cas nrog kev ua tau zoo thiab kev saib xyuas, raws li nws muaj peev xwm overwrite thiab txawm rho tawm cov ntaub ntawv yam tsis tau ceeb toom ua ntej.
Tus kws kho tshwj xeeb hauv kev siv thev naus laus zis thiab teeb meem hauv internet nrog ntau tshaj kaum xyoo ntawm kev paub hauv cov xov xwm sib txawv. Kuv tau ua haujlwm ua tus editor thiab tus tsim cov ntsiab lus rau e-lag luam, kev sib txuas lus, kev lag luam online thiab cov tuam txhab tshaj tawm. Kuv kuj tau sau rau ntawm kev lag luam, nyiaj txiag thiab lwm cov vev xaib. Kuv txoj hauj lwm kuj yog kuv lub siab nyiam. Tam sim no, dhau ntawm kuv cov ntawv hauv Tecnobits, Kuv sim tshawb nrhiav txhua yam xov xwm thiab lub cib fim tshiab uas lub ntiaj teb kev siv tshuab muab rau peb txhua hnub los txhim kho peb lub neej.