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man/man7/suffixes.7: Add .zst suffix

PATCH In review Patsy Griffin 3 participants 6 messages May 7 Man-pages: manual pages for Linux -- Sections 2, 3, 4, 5, and 7

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Patsy Griffin

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#0 lore raw

PATCH 1/2 man/man7/suffixes.7: Add .zst suffix

Signed-off-by Patsy Griffin <[email protected]>
---
 man/man7/suffixes.7 | 5 +++++
 1 file changed, 5 insertions(+)
man/man7/suffixes.7 +5 -0
index e21ac3ab8..3e17afc77 100644
@@ -255,6 +255,11 @@ File compressed using
 T}
 \&.zip	\f[B]zip\f[](1) archive
 \&.zoo	\f[B]zoo\f[](1) archive
+\&.zst	T{
+File compressed using
+.BR zstd (1)
+format
+T}
 \&\[ti]	Emacs or \f[B]patch\f[](1) backup file
 \&rc	startup (`run control') file, e.g., \f[I].newsrc\f[]
 .TE
Signature · 1 line
2.51.1
author
#1 lore raw

PATCH 2/2 man/man5/core.5: Update compression format for systemd-coredump

As of version 246, systemd-coredump defaults to zstd compression for core dumps, rather than lz4.

Signed-off-by Patsy Griffin <[email protected]>
---
 man/man5/core.5 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
man/man5/core.5 +6 -2
index 4da5819b6..ee34eded3 100644
@@ -515,9 +515,13 @@ program:
 In this case, core dumps will be placed in the location configured for
 .BR systemd\-coredump (8),
 typically as
-.BR lz4 (1)
-compressed files in the directory
+.BR zstd (1)
+compressed files
+.\" Since Systemd 246:
+.\" commit ef5924aa313d1892bb491c870ba3c429454dfc76
+in the directory
 .IR /var/lib/systemd/coredump/ .
+Compression on or off is configurable via coredump.conf(5).
 One can list the core dumps that have been recorded by
 .BR systemd\-coredump (8)
 using
Signature · 1 line
2.51.1
maintainer Reviewed-by Carlos O'Donell on v1 2/2
#2 lore raw

Re: [PATCH 2/2] man/man5/core.5: Update compression format for systemd-coredump

Hi Patsy, Carlos,

Quoted 15 lines · Patsy Griffin

As of version 246, systemd-coredump defaults to zstd compression for core dumps, rather than lz4.

Signed-off-by Patsy Griffin <[email protected]>
---
 man/man5/core.5 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
man/man5/core.5 +0 -0
index 4da5819b6..ee34eded3 100644
@@ -515,9 +515,13 @@ program:
 In this case, core dumps will be placed in the location configured for
 .BR systemd\-coredump (8),

man/man5/core.5 program: · line 524

Quoted 10 lines
man/man5/core.5 +6 -2
 typically as
-.BR lz4 (1)
-compressed files in the directory
+.BR zstd (1)
+compressed files
+.\" Since Systemd 246:
+.\" commit ef5924aa313d1892bb491c870ba3c429454dfc76
+in the directory
 .IR /var/lib/systemd/coredump/ .
+Compression on or off is configurable via coredump.conf(5).

Thanks! I've reformatted it, and moved the comment to the commit message, where it's less noisy.

commit XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Author: Patsy Griffin <[email protected]>
Date: 2026-05-07 15:05:08 -0400

man/man5/core.5: Update compression format for systemd-coredump

As of version 246, systemd-coredump defaults to zstd compression for core dumps, rather than lz4.

systemd.git ef5924aa (2020-05-04; "coredump: add zstandard support for coredumps")

Signed-off-by Patsy Griffin <[email protected]>

Message-ID: <[email protected]>

Reviewed-by Carlos O'Donell <[email protected]>

Message-ID: <[email protected]>

[alx: Minor tweaks]
Signed-off-by Alejandro Colomar <[email protected]>

diff --git a/man/man5/core.5 b/man/man5/core.5
index 4da5819b..7b02bd5b 100644
--- a/man/man5/core.5
+++ b/man/man5/core.5
@@ -515,9 +515,11 @@ .SS Core dumps and systemd
In this case, core dumps will be placed in the location configured for .BR systemd\-coredump (8),
typically as
-.BR lz4 (1)
+.BR zstd (1)
compressed files in the directory
.IR /var/lib/systemd/coredump/ .
+Compression on or off is configurable via
+.BR coredump.conf (5).
One can list the core dumps that have been recorded by .BR systemd\-coredump (8)
using

Carlos, I've kept your Rb tag, as nothing has changed meaningfully. Would you all mind confirming this is okay?

Have a lovely night!
Alex

Quoted 6 lines
man/man5/core.5 +0 -0
 One can list the core dumps that have been recorded by
 .BR systemd\-coredump (8)
 using
Signature · 1 line
2.51.1
Signature · 1 line
<https://www.alejandro-colomar.es>
#3 lore raw

Re: [PATCH 2/2] man/man5/core.5: Update compression format for systemd-coredump

Quoted 68 lines · Alejandro Colomar

Hi Patsy, Carlos,

Quoted 15 lines · Patsy Griffin

As of version 246, systemd-coredump defaults to zstd compression for core dumps, rather than lz4.

Signed-off-by Patsy Griffin <[email protected]>
---
  man/man5/core.5 | 8 ++++++--
  1 file changed, 6 insertions(+), 2 deletions(-)
man/man5/core.5 +0 -0
index 4da5819b6..ee34eded3 100644
@@ -515,9 +515,13 @@ program:
  In this case, core dumps will be placed in the location configured for
  .BR systemd\-coredump (8),

man/man5/core.5 program: · line 524

Quoted 10 lines
man/man5/core.5 +6 -2
  typically as
-.BR lz4 (1)
-compressed files in the directory
+.BR zstd (1)
+compressed files
+.\" Since Systemd 246:
+.\" commit ef5924aa313d1892bb491c870ba3c429454dfc76
+in the directory
  .IR /var/lib/systemd/coredump/ .
+Compression on or off is configurable via coredump.conf(5).

Thanks! I've reformatted it, and moved the comment to the commit message, where it's less noisy.

commit XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Author: Patsy Griffin <[email protected]>
Date: 2026-05-07 15:05:08 -0400

man/man5/core.5: Update compression format for systemd-coredump

As of version 246, systemd-coredump defaults to zstd compression for core dumps, rather than lz4.

systemd.git ef5924aa (2020-05-04; "coredump: add zstandard support for coredumps")

Signed-off-by Patsy Griffin <[email protected]>

Message-ID: <[email protected]>

Reviewed-by Carlos O'Donell <[email protected]>

Message-ID: <[email protected]>

[alx: Minor tweaks]
Signed-off-by Alejandro Colomar <[email protected]>

diff --git a/man/man5/core.5 b/man/man5/core.5
index 4da5819b..7b02bd5b 100644
--- a/man/man5/core.5
+++ b/man/man5/core.5
@@ -515,9 +515,11 @@ .SS Core dumps and systemd
In this case, core dumps will be placed in the location configured for .BR systemd\-coredump (8),
typically as
-.BR lz4 (1)
+.BR zstd (1)
compressed files in the directory
.IR /var/lib/systemd/coredump/ .
+Compression on or off is configurable via
+.BR coredump.conf (5).
One can list the core dumps that have been recorded by .BR systemd\-coredump (8)
using

Quoted 2 lines

Carlos, I've kept your Rb tag, as nothing has changed meaningfully. Would you all mind confirming this is okay?

Absolutely. LGTM.

Quoted 10 lines

Have a lovely night!
Alex

Quoted 6 lines
man/man5/core.5 +0 -0
  One can list the core dumps that have been recorded by
  .BR systemd\-coredump (8)
  using
Signature · 1 line
2.51.1
Signature · 2 lines
Cheers,
Carlos.
author
#4 lore raw

Re: [PATCH 2/2] man/man5/core.5: Update compression format for systemd-coredump

In reply to Alejandro Colomar

LGTM. Thank you!

Quoted 85 lines · Alejandro Colomar

Hi Patsy, Carlos,

Quoted 15 lines · Patsy Griffin

As of version 246, systemd-coredump defaults to zstd compression for core dumps, rather than lz4.

Signed-off-by Patsy Griffin <[email protected]>
---
 man/man5/core.5 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
man/man5/core.5 +0 -0
index 4da5819b6..ee34eded3 100644
@@ -515,9 +515,13 @@ program:
 In this case, core dumps will be placed in the location configured for
 .BR systemd\-coredump (8),

man/man5/core.5 program: · line 524

Quoted 10 lines
man/man5/core.5 +6 -2
 typically as
-.BR lz4 (1)
-compressed files in the directory
+.BR zstd (1)
+compressed files
+.\" Since Systemd 246:
+.\" commit ef5924aa313d1892bb491c870ba3c429454dfc76
+in the directory
 .IR /var/lib/systemd/coredump/ .
+Compression on or off is configurable via coredump.conf(5).

Thanks! I've reformatted it, and moved the comment to the commit message, where it's less noisy.

commit XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Author: Patsy Griffin <[email protected]>
Date: 2026-05-07 15:05:08 -0400

man/man5/core.5: Update compression format for systemd-coredump

As of version 246, systemd-coredump defaults to zstd compression for core dumps, rather than lz4.

systemd.git ef5924aa (2020-05-04; "coredump: add zstandard support for coredumps")

Signed-off-by Patsy Griffin <[email protected]>

Message-ID: <[email protected]>

Reviewed-by Carlos O'Donell <[email protected]>

Message-ID: <[email protected]>

[alx: Minor tweaks]
Signed-off-by Alejandro Colomar <[email protected]>

diff --git a/man/man5/core.5 b/man/man5/core.5
index 4da5819b..7b02bd5b 100644
--- a/man/man5/core.5
+++ b/man/man5/core.5
@@ -515,9 +515,11 @@ .SS Core dumps and systemd
In this case, core dumps will be placed in the location configured for .BR systemd\-coredump (8),
typically as
-.BR lz4 (1)
+.BR zstd (1)
compressed files in the directory
.IR /var/lib/systemd/coredump/ .
+Compression on or off is configurable via
+.BR coredump.conf (5).
One can list the core dumps that have been recorded by .BR systemd\-coredump (8)
using

Carlos, I've kept your Rb tag, as nothing has changed meaningfully. Would you all mind confirming this is okay?

Have a lovely night!
Alex

Quoted 6 lines
man/man5/core.5 +0 -1
 One can list the core dumps that have been recorded by
 .BR systemd\-coredump (8)
 using
--

2.51.1

--
<https://www.alejandro-colomar.es>

maintainer
#5 lore raw
In reply to Patsy Griffin

Hi Patsy,

Quoted 1 line · Patsy Griffin
Signed-off-by Patsy Griffin <[email protected]>

Thanks! I've applied the patch.

Cheers,
Alex

Quoted 24 lines
---
 man/man7/suffixes.7 | 5 +++++
 1 file changed, 5 insertions(+)
man/man7/suffixes.7 +5 -0
index e21ac3ab8..3e17afc77 100644
@@ -255,6 +255,11 @@ File compressed using
 T}
 \&.zip	\f[B]zip\f[](1) archive
 \&.zoo	\f[B]zoo\f[](1) archive
+\&.zst	T{
+File compressed using
+.BR zstd (1)
+format
+T}
 \&\[ti]	Emacs or \f[B]patch\f[](1) backup file
 \&rc	startup (`run control') file, e.g., \f[I].newsrc\f[]
 .TE
Signature · 1 line
2.51.1
Signature · 1 line
<https://www.alejandro-colomar.es>