Out of curiosity, I ran:
sudo pacman -Syu --debug |& cat -n >> pacman-log
Just to see what is really happening under the hood when we run pacman operations. Then I came across several debug messages that I don’t know whether I should be concerned about. Here is the contents of pacman-log:
1 debug: pacman v6.0.0 - libalpm v13.0.0
2 debug: config: attempting to read file /etc/pacman.conf
3 debug: config: new section 'options'
4 debug: config: CacheDir: /var/cache/pacman/pkg/
5 debug: config: HoldPkg: pacman
6 debug: config: HoldPkg: glibc
7 debug: config: HoldPkg: manjaro-system
8 debug: config: SyncFirst: manjaro-system
9 debug: config: SyncFirst: archlinux-keyring
10 debug: config: SyncFirst: manjaro-keyring
11 debug: config: Architecture: auto
12 debug: config: arch: x86_64
13 debug: config: SigLevel: Required
14 debug: config: SigLevel: DatabaseOptional
15 debug: config: LocalFileSigLevel: Optional
16 debug: config: new section 'core'
17 debug: config: SigLevel: PackageRequired
18 debug: config file /etc/pacman.conf, line 77: including /etc/pacman.d/mirrorlist
19 debug: config: new section 'extra'
20 debug: config: SigLevel: PackageRequired
21 debug: config file /etc/pacman.conf, line 81: including /etc/pacman.d/mirrorlist
22 debug: config: new section 'community'
23 debug: config: SigLevel: PackageRequired
24 debug: config file /etc/pacman.conf, line 85: including /etc/pacman.d/mirrorlist
25 debug: config: new section 'multilib'
26 debug: config: SigLevel: PackageRequired
27 debug: config file /etc/pacman.conf, line 92: including /etc/pacman.d/mirrorlist
28 debug: config: finished parsing /etc/pacman.conf
29 debug: setup_libalpm called
30 debug: option 'logfile' = /var/log/pacman.log
31 debug: option 'gpgdir' = /etc/pacman.d/gnupg/
32 debug: option 'hookdir' = /etc/pacman.d/hooks/
33 debug: option 'cachedir' = /var/cache/pacman/pkg/
34 debug: registering sync database 'core'
35 debug: database path for tree core set to /var/lib/pacman/sync/core.db
36 debug: "/var/lib/pacman/sync/core.db.sig" is not readable: No such file or directory
37 debug: sig path /var/lib/pacman/sync/core.db.sig could not be opened
38 debug: got error 43 at _alpm_gpgme_checksig (../lib/libalpm/signing.c: 593) : missing PGP signature
39 debug: missing optional signature
40 debug: setting usage of 15 for core repository
41 debug: adding new server URL to database 'core': https://mirrors.fossho.st/manjaro/stable/core/x86_64
42 debug: adding new server URL to database 'core': https://mirrors.manjaro.org/repo/stable/core/x86_64
43 debug: adding new server URL to database 'core': http://mirror.datacenter.by/pub/mirrors/manjaro/stable/core/x86_64
44 debug: adding new server URL to database 'core': https://mirror.koddos.net/manjaro/stable/core/x86_64
45 debug: adding new server URL to database 'core': https://osmirror.org/manjaro/stable/core/x86_64
46 debug: adding new server URL to database 'core': https://manjaro.mirror.liquidtelecom.com/stable/core/x86_64
47 debug: adding new server URL to database 'core': https://ftp.cc.uoc.gr/mirrors/linux/manjaro/stable/core/x86_64
48 debug: adding new server URL to database 'core': https://ftp.nluug.nl/pub/os/Linux/distr/manjaro/stable/core/x86_64
49 debug: registering sync database 'extra'
50 debug: database path for tree extra set to /var/lib/pacman/sync/extra.db
51 debug: "/var/lib/pacman/sync/extra.db.sig" is not readable: No such file or directory
52 debug: sig path /var/lib/pacman/sync/extra.db.sig could not be opened
53 debug: got error 43 at _alpm_gpgme_checksig (../lib/libalpm/signing.c: 593) : missing PGP signature
54 debug: missing optional signature
55 debug: setting usage of 15 for extra repository
56 debug: adding new server URL to database 'extra': https://mirrors.fossho.st/manjaro/stable/extra/x86_64
57 debug: adding new server URL to database 'extra': https://mirrors.manjaro.org/repo/stable/extra/x86_64
58 debug: adding new server URL to database 'extra': http://mirror.datacenter.by/pub/mirrors/manjaro/stable/extra/x86_64
59 debug: adding new server URL to database 'extra': https://mirror.koddos.net/manjaro/stable/extra/x86_64
60 debug: adding new server URL to database 'extra': https://osmirror.org/manjaro/stable/extra/x86_64
61 debug: adding new server URL to database 'extra': https://manjaro.mirror.liquidtelecom.com/stable/extra/x86_64
62 debug: adding new server URL to database 'extra': https://ftp.cc.uoc.gr/mirrors/linux/manjaro/stable/extra/x86_64
63 debug: adding new server URL to database 'extra': https://ftp.nluug.nl/pub/os/Linux/distr/manjaro/stable/extra/x86_64
64 debug: registering sync database 'community'
65 debug: database path for tree community set to /var/lib/pacman/sync/community.db
66 debug: "/var/lib/pacman/sync/community.db.sig" is not readable: No such file or directory
67 debug: sig path /var/lib/pacman/sync/community.db.sig could not be opened
68 debug: got error 43 at _alpm_gpgme_checksig (../lib/libalpm/signing.c: 593) : missing PGP signature
69 debug: missing optional signature
70 debug: setting usage of 15 for community repository
71 debug: adding new server URL to database 'community': https://mirrors.fossho.st/manjaro/stable/community/x86_64
72 debug: adding new server URL to database 'community': https://mirrors.manjaro.org/repo/stable/community/x86_64
73 debug: adding new server URL to database 'community': http://mirror.datacenter.by/pub/mirrors/manjaro/stable/community/x86_64
74 debug: adding new server URL to database 'community': https://mirror.koddos.net/manjaro/stable/community/x86_64
75 debug: adding new server URL to database 'community': https://osmirror.org/manjaro/stable/community/x86_64
76 debug: adding new server URL to database 'community': https://manjaro.mirror.liquidtelecom.com/stable/community/x86_64
77 debug: adding new server URL to database 'community': https://ftp.cc.uoc.gr/mirrors/linux/manjaro/stable/community/x86_64
78 debug: adding new server URL to database 'community': https://ftp.nluug.nl/pub/os/Linux/distr/manjaro/stable/community/x86_64
79 debug: registering sync database 'multilib'
80 debug: database path for tree multilib set to /var/lib/pacman/sync/multilib.db
81 debug: "/var/lib/pacman/sync/multilib.db.sig" is not readable: No such file or directory
82 debug: sig path /var/lib/pacman/sync/multilib.db.sig could not be opened
83 debug: got error 43 at _alpm_gpgme_checksig (../lib/libalpm/signing.c: 593) : missing PGP signature
84 debug: missing optional signature
85 debug: setting usage of 15 for multilib repository
86 debug: adding new server URL to database 'multilib': https://mirrors.fossho.st/manjaro/stable/multilib/x86_64
87 debug: adding new server URL to database 'multilib': https://mirrors.manjaro.org/repo/stable/multilib/x86_64
88 debug: adding new server URL to database 'multilib': http://mirror.datacenter.by/pub/mirrors/manjaro/stable/multilib/x86_64
89 debug: adding new server URL to database 'multilib': https://mirror.koddos.net/manjaro/stable/multilib/x86_64
90 debug: adding new server URL to database 'multilib': https://osmirror.org/manjaro/stable/multilib/x86_64
91 debug: adding new server URL to database 'multilib': https://manjaro.mirror.liquidtelecom.com/stable/multilib/x86_64
92 debug: adding new server URL to database 'multilib': https://ftp.cc.uoc.gr/mirrors/linux/manjaro/stable/multilib/x86_64
93 debug: adding new server URL to database 'multilib': https://ftp.nluug.nl/pub/os/Linux/distr/manjaro/stable/multilib/x86_64
94 :: Synchronizing package databases...
95 core downloading...
96 extra downloading...
97 community downloading...
98 multilib downloading...
99 debug: core.db: url is https://mirrors.fossho.st/manjaro/stable/core/x86_64/core.db
100 debug: core.db: maxsize 134217728
101 debug: core.db: using time condition 1627462598
102 debug: core.db: opened tempfile for download: /var/lib/pacman/sync/core.db.part (wb)
103 debug: core.db: curl returned result 0 from transfer
104 debug: core.db: response code 304
105 debug: core.db.sig: url is https://mirrors.fossho.st/manjaro/stable/core/x86_64/core.db.sig
106 debug: core.db.sig: maxsize 16384
107 debug: core.db.sig: opened tempfile for download: /var/lib/pacman/sync/core.db.sig.part (wb)
108 debug: core.db: file met time condition
109 debug: core.db.sig: curl returned result 0 from transfer
110 debug: core.db.sig: response code 404
111 debug: core.db.sig: no more servers to retry
112 debug: extra.db: url is https://mirrors.fossho.st/manjaro/stable/extra/x86_64/extra.db
113 debug: extra.db: maxsize 134217728
114 debug: extra.db: using time condition 1627569942
115 debug: extra.db: opened tempfile for download: /var/lib/pacman/sync/extra.db.part (wb)
116 debug: extra.db: curl returned result 0 from transfer
117 debug: extra.db: response code 304
118 debug: extra.db.sig: url is https://mirrors.fossho.st/manjaro/stable/extra/x86_64/extra.db.sig
119 debug: extra.db.sig: maxsize 16384
120 debug: extra.db.sig: opened tempfile for download: /var/lib/pacman/sync/extra.db.sig.part (wb)
121 debug: extra.db: file met time condition
122 debug: extra.db.sig: curl returned result 0 from transfer
123 debug: extra.db.sig: response code 404
124 debug: extra.db.sig: no more servers to retry
125 debug: community.db: url is https://mirrors.fossho.st/manjaro/stable/community/x86_64/community.db
126 debug: community.db: maxsize 134217728
127 debug: community.db: using time condition 1627569949
128 debug: community.db: opened tempfile for download: /var/lib/pacman/sync/community.db.part (wb)
129 debug: community.db: curl returned result 0 from transfer
130 debug: community.db: response code 304
131 debug: community.db.sig: url is https://mirrors.fossho.st/manjaro/stable/community/x86_64/community.db.sig
132 debug: community.db.sig: maxsize 16384
133 debug: community.db.sig: opened tempfile for download: /var/lib/pacman/sync/community.db.sig.part (wb)
134 debug: community.db: file met time condition
135 debug: community.db.sig: curl returned result 0 from transfer
136 debug: community.db.sig: response code 404
137 debug: community.db.sig: no more servers to retry
138 debug: multilib.db: url is https://mirrors.fossho.st/manjaro/stable/multilib/x86_64/multilib.db
139 debug: multilib.db: maxsize 134217728
140 debug: multilib.db: using time condition 1627462602
141 debug: multilib.db: opened tempfile for download: /var/lib/pacman/sync/multilib.db.part (wb)
142 debug: multilib.db: curl returned result 0 from transfer
143 debug: multilib.db: response code 304
144 debug: multilib.db.sig: url is https://mirrors.fossho.st/manjaro/stable/multilib/x86_64/multilib.db.sig
I was wondering about lines 36, 37, 38, and 39 (there are other similar messages throughout the log)
Should I be concerned?