How does debian/ubuntu knows a package has a updated version
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If my understanding is good, with apt update
, Debian download a release file and with this file, it can tell if a package needs to be upgraded and with which dependencies. How does it do this? Th release file seems to be just a list of hashes so I don't quite understand.
Sorry, I don't have a very good English.
ubuntu debian apt
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If my understanding is good, with apt update
, Debian download a release file and with this file, it can tell if a package needs to be upgraded and with which dependencies. How does it do this? Th release file seems to be just a list of hashes so I don't quite understand.
Sorry, I don't have a very good English.
ubuntu debian apt
New contributor
add a comment |
If my understanding is good, with apt update
, Debian download a release file and with this file, it can tell if a package needs to be upgraded and with which dependencies. How does it do this? Th release file seems to be just a list of hashes so I don't quite understand.
Sorry, I don't have a very good English.
ubuntu debian apt
New contributor
If my understanding is good, with apt update
, Debian download a release file and with this file, it can tell if a package needs to be upgraded and with which dependencies. How does it do this? Th release file seems to be just a list of hashes so I don't quite understand.
Sorry, I don't have a very good English.
ubuntu debian apt
ubuntu debian apt
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New contributor
New contributor
asked 4 hours ago
thomasthomas
82
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2 Answers
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Whilst apt update
can download one or more Release
files, the primary files it is downloading are Packages
file(s). Those files contain the full list of available packages, their versions, and other metadata (like dependencies). Once apt has a list of available packages and their versions, it is a straightforward matter of comparison to determine which packages have versions newer than those currently installed.
Thanks a lot for this.
– thomas
3 hours ago
add a comment |
Package lists are the Packages and Sources files. These contain the debian/control file content for every package in the repository. From these metadata APT can determine a dependency solution.
Releases is a description of the entire archive and signature data.
Debian reference manual, Chapter 2. Debian package management
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2 Answers
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active
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2 Answers
2
active
oldest
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Whilst apt update
can download one or more Release
files, the primary files it is downloading are Packages
file(s). Those files contain the full list of available packages, their versions, and other metadata (like dependencies). Once apt has a list of available packages and their versions, it is a straightforward matter of comparison to determine which packages have versions newer than those currently installed.
Thanks a lot for this.
– thomas
3 hours ago
add a comment |
Whilst apt update
can download one or more Release
files, the primary files it is downloading are Packages
file(s). Those files contain the full list of available packages, their versions, and other metadata (like dependencies). Once apt has a list of available packages and their versions, it is a straightforward matter of comparison to determine which packages have versions newer than those currently installed.
Thanks a lot for this.
– thomas
3 hours ago
add a comment |
Whilst apt update
can download one or more Release
files, the primary files it is downloading are Packages
file(s). Those files contain the full list of available packages, their versions, and other metadata (like dependencies). Once apt has a list of available packages and their versions, it is a straightforward matter of comparison to determine which packages have versions newer than those currently installed.
Whilst apt update
can download one or more Release
files, the primary files it is downloading are Packages
file(s). Those files contain the full list of available packages, their versions, and other metadata (like dependencies). Once apt has a list of available packages and their versions, it is a straightforward matter of comparison to determine which packages have versions newer than those currently installed.
answered 3 hours ago
womble♦womble
85.8k18145204
85.8k18145204
Thanks a lot for this.
– thomas
3 hours ago
add a comment |
Thanks a lot for this.
– thomas
3 hours ago
Thanks a lot for this.
– thomas
3 hours ago
Thanks a lot for this.
– thomas
3 hours ago
add a comment |
Package lists are the Packages and Sources files. These contain the debian/control file content for every package in the repository. From these metadata APT can determine a dependency solution.
Releases is a description of the entire archive and signature data.
Debian reference manual, Chapter 2. Debian package management
add a comment |
Package lists are the Packages and Sources files. These contain the debian/control file content for every package in the repository. From these metadata APT can determine a dependency solution.
Releases is a description of the entire archive and signature data.
Debian reference manual, Chapter 2. Debian package management
add a comment |
Package lists are the Packages and Sources files. These contain the debian/control file content for every package in the repository. From these metadata APT can determine a dependency solution.
Releases is a description of the entire archive and signature data.
Debian reference manual, Chapter 2. Debian package management
Package lists are the Packages and Sources files. These contain the debian/control file content for every package in the repository. From these metadata APT can determine a dependency solution.
Releases is a description of the entire archive and signature data.
Debian reference manual, Chapter 2. Debian package management
answered 3 hours ago
John MahowaldJohn Mahowald
8,9111713
8,9111713
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