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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
asked 2 hours ago
thomasthomas
82
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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
asked 2 hours ago
thomasthomas
82
New contributor
thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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
asked 2 hours ago
thomasthomas
82
New contributor
thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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
asked 2 hours ago
thomasthomas
82
New contributor
thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
thomasthomas
82
New contributor
thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
thomasthomas
82
New contributor
thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
thomasthomas
82
asked 2 hours ago
thomasthomas
82
82
New contributor
thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
thomas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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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.
answered 1 hour ago
womble♦womble
85.8k18145204
Thanks a lot for this.
– thomas
1 hour 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
answered 1 hour ago
John MahowaldJohn Mahowald
8,9111713
add a comment |
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2 Answers
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active
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2 Answers
2
active
oldest
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active
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active
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votes
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 1 hour ago
womble♦womble
85.8k18145204
Thanks a lot for this.
– thomas
1 hour 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.
answered 1 hour ago
womble♦womble
85.8k18145204
Thanks a lot for this.
– thomas
1 hour 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.
answered 1 hour ago
womble♦womble
85.8k18145204
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 1 hour ago
womble♦womble
85.8k18145204
answered 1 hour ago
womble♦womble
85.8k18145204
answered 1 hour ago
womble♦womble
85.8k18145204
answered 1 hour ago
womble♦womble
85.8k18145204
85.8k18145204
Thanks a lot for this.
– thomas
1 hour ago
add a comment |
Thanks a lot for this.
– thomas
1 hour ago
Thanks a lot for this.
– thomas
1 hour ago
Thanks a lot for this.
– thomas
1 hour 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
answered 1 hour ago
John MahowaldJohn Mahowald
8,9111713
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
answered 1 hour ago
John MahowaldJohn Mahowald
8,9111713
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
answered 1 hour ago
John MahowaldJohn Mahowald
8,9111713
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 1 hour ago
John MahowaldJohn Mahowald
8,9111713
answered 1 hour ago
John MahowaldJohn Mahowald
8,9111713
answered 1 hour ago
John MahowaldJohn Mahowald
8,9111713
answered 1 hour ago
John MahowaldJohn Mahowald
8,9111713
8,9111713
add a comment |
add a comment |
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