安裝工具：

sudo apt install apt-file

然后更新緩存信息：

sudo apt-file  update

查找debuild這個文件屬于那個包：apt-file search debuild:

adams@adams-PC:~/$ apt-file search debuild
devscripts: /usr/bin/cvs-debuild          
devscripts: /usr/bin/debuild
devscripts: /usr/share/bash-completion/completions/debuild
devscripts: /usr/share/man/de/man1/cvs-debuild.1.gz
devscripts: /usr/share/man/de/man1/debuild.1.gz
devscripts: /usr/share/man/fr/man1/cvs-debuild.1.gz
devscripts: /usr/share/man/fr/man1/debuild.1.gz
devscripts: /usr/share/man/man1/cvs-debuild.1.gz
devscripts: /usr/share/man/man1/debuild.1.gz
golang-github-aws-aws-sdk-go-dev: /usr/share/gocode/src/github.com/aws/aws-sdk-go/service/codebuild/api.go
golang-github-aws-aws-sdk-go-dev: /usr/share/gocode/src/github.com/aws/aws-sdk-go/service/codebuild/codebuildiface/interface.go
golang-github-aws-aws-sdk-go-dev: /usr/share/gocode/src/github.com/aws/aws-sdk-go/service/codebuild/doc.go
golang-github-aws-aws-sdk-go-dev: /usr/share/gocode/src/github.com/aws/aws-sdk-go/service/codebuild/errors.go
golang-github-aws-aws-sdk-go-dev: /usr/share/gocode/src/github.com/aws/aws-sdk-go/service/codebuild/examples_test.go
golang-github-aws-aws-sdk-go-dev: /usr/share/gocode/src/github.com/aws/aws-sdk-go/service/codebuild/integ_test.go
golang-github-aws-aws-sdk-go-dev: /usr/share/gocode/src/github.com/aws/aws-sdk-go/service/codebuild/service.go
libgrantlee-dev: /usr/include/grantlee/bbcodebuilder.h
libgrantlee5-dev: /usr/include/grantlee/bbcodebuilder.h
pbuilder: /usr/bin/debuild-pbuilder
pbuilder: /usr/bin/pdebuild
pbuilder: /usr/lib/pbuilder/pdebuild-checkparams
pbuilder: /usr/lib/pbuilder/pdebuild-internal
pbuilder: /usr/share/man/man1/debuild-pbuilder.1.gz
pbuilder: /usr/share/man/man1/pdebuild.1.gz
pkg-perl-tools: /usr/share/doc/pkg-perl-tools/examples/buildpackage-pdebuild
python-botocore: /usr/lib/python2.7/dist-packages/botocore/data/codebuild/2016-10-06/examples-1.json
python-botocore: /usr/lib/python2.7/dist-packages/botocore/data/codebuild/2016-10-06/paginators-1.json
python-botocore: /usr/lib/python2.7/dist-packages/botocore/data/codebuild/2016-10-06/service-2.json
python3-botocore: /usr/lib/python3/dist-packages/botocore/data/codebuild/2016-10-06/examples-1.json
python3-botocore: /usr/lib/python3/dist-packages/botocore/data/codebuild/2016-10-06/paginators-1.json
python3-botocore: /usr/lib/python3/dist-packages/botocore/data/codebuild/2016-10-06/service-2.json
qt5-qmake: /usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/uikit/xcodebuild.mk
qt5-qmake: /usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/uikit/xcodebuild.prf
zsh-common: /usr/share/zsh/functions/Completion/Debian/_debuild
adams@adams-PC:~/$ 

根據上面輸出，可以知道debuild 屬于devscripts這個包。

下載devscripts這個包就可以得到debuild工具了。