CentOS 7（バージョン7.6.1810）で試したほとんどのyum操作は、リポジトリにアクセスしようとすると中断されるようです。たとえば、プロセスを実行すると、次yum install phpの行で停止します。
C7.0.1406-base/primary 100% [================================] 390 kB/s | 2.4 MB 00:00:00 ETA
Ctrl+ をクリックするとプロセスは続行されますが、Cまもなく同様の行で停止します。
ところで、コマンドがyum repolist all返されます。
Loaded plugins: axelget, fastestmirror, langpacks
No metadata available for C7.0.1406-base
No metadata available for C7.0.1406-centosplus
repomd.xml | 2.9 kB 00:00:00
update C7.0.1406-extras metadata successfully
repomd.xml | 2.9 kB 00:00:00
update C7.0.1406-fasttrack metadata successfully
No metadata available for C7.0.1406-updates
No metadata available for C7.1.1503-base
No metadata available for C7.1.1503-centosplus
No metadata available for C7.1.1503-extras
No metadata available for C7.1.1503-fasttrack
No metadata available for C7.1.1503-updates
No metadata available for C7.2.1511-base
No metadata available for C7.2.1511-centosplus
No metadata available for C7.2.1511-extras
No metadata available for C7.2.1511-fasttrack
No metadata available for C7.2.1511-updates
No metadata available for C7.3.1611-base
No metadata available for C7.3.1611-centosplus
No metadata available for C7.3.1611-extras
No metadata available for C7.3.1611-fasttrack
No metadata available for C7.3.1611-updates
No metadata available for C7.4.1708-base
No metadata available for C7.4.1708-centosplus
No metadata available for C7.4.1708-extras
No metadata available for C7.4.1708-fasttrack
No metadata available for C7.4.1708-updates
No metadata available for base
No metadata available for elrepo
No metadata available for epel
No metadata available for extras
No metadata available for ius
No metadata available for rpmfusion-free-updates
No metadata available for rpmfusion-nonfree-updates
No metadata available for updates
No metadata available for webtatic
Loading mirror speeds from cached hostfile
* base: mirrors.vooservers.com
* elrepo: mirrors.coreix.net
* epel: mirrors.ukfast.co.uk
* extras: mirror.as29550.net
* ius: lon.mirror.rackspace.com
* rpmfusion-free-updates: mirror.ehv.weppel.nl
* rpmfusion-nonfree-updates: mirror.ehv.weppel.nl
* updates: mirrors.vooservers.com
* webtatic: uk.repo.webtatic.com
(1/13): C7.0.1406-extras/x86_64/primary_db | 43 kB 00:00:00
(2/13): C7.0.1406-fasttrack/x86_64/primary_db | 124 kB 00:00:00
(3/13): C7.1.1503-extras/x86_64/primary_db | 120 kB 00:00:00
(4/13): C7.1.1503-fasttrack/x86_64/primary_db | 71 kB 00:00:00
(5/13): C7.2.1511-fasttrack/x86_64/primary_db | 1.2 kB 00:00:00
(6/13): C7.2.1511-extras/x86_64/primary_db | 166 kB 00:00:00
(7/13): C7.3.1611-fasttrack/x86_64/primary_db | 1.2 kB 00:00:00
(8/13): C7.3.1611-extras/x86_64/primary_db | 191 kB 00:00:00
(9/13): C7.4.1708-fasttrack/x86_64/primary_db | 1.2 kB 00:00:00
(10/13): C7.4.1708-extras/x86_64/primary_db | 185 kB 00:00:00
(11/13): C7.0.1406-centosplus/x86_64/primary_db | 3.5 MB 00:00:01
(12/13): C7.0.1406-base/x86_64/primary_db | 4.9 MB 00:00:01
(13/13): C7.0.1406-updates/x86_64/primary_db | 7.2 MB 00:00:02
repo id repo name status
!C7.0.1406-base/x86_64 CentOS-7.0.1406 - Base enabled: 8,465
!C7.0.1406-centosplus/x86_64 CentOS-7.0.1406 - CentOSPlus enabled: 123
!C7.0.1406-extras/x86_64 CentOS-7.0.1406 - Extras enabled: 104
!C7.0.1406-fasttrack/x86_64 CentOS-7.0.1406 - CentOSPlus enabled: 155
!C7.0.1406-updates/x86_64 CentOS-7.0.1406 - Updates enabled: 1,725
!C7.1.1503-base/x86_64 CentOS-7.1.1503 - Base enabled: 8,652
!C7.1.1503-centosplus/x86_64 CentOS-7.1.1503 - CentOSPlus enabled: 73
!C7.1.1503-extras/x86_64 CentOS-7.1.1503 - Extras enabled: 285
!C7.1.1503-fasttrack/x86_64 CentOS-7.1.1503 - CentOSPlus enabled: 110
!C7.1.1503-updates/x86_64 CentOS-7.1.1503 - Updates enabled: 1,726
!C7.2.1511-base/x86_64 CentOS-7.2.1511 - Base enabled: 9,007
!C7.2.1511-centosplus/x86_64 CentOS-7.2.1511 - CentOSPlus enabled: 134
!C7.2.1511-extras/x86_64 CentOS-7.2.1511 - Extras enabled: 393
!C7.2.1511-fasttrack/x86_64 CentOS-7.2.1511 - CentOSPlus enabled: 0
!C7.2.1511-updates/x86_64 CentOS-7.2.1511 - Updates enabled: 2,560
!C7.3.1611-base/x86_64 CentOS-7.3.1611 - Base enabled: 9,363
!C7.3.1611-centosplus/x86_64 CentOS-7.3.1611 - CentOSPlus enabled: 101
!C7.3.1611-extras/x86_64 CentOS-7.3.1611 - Extras enabled: 451
!C7.3.1611-fasttrack/x86_64 CentOS-7.3.1611 - CentOSPlus enabled: 0
!C7.3.1611-updates/x86_64 CentOS-7.3.1611 - Updates enabled: 2,146
!C7.4.1708-base/x86_64 CentOS-7.4.1708 - Base enabled: 9,591
!C7.4.1708-centosplus/x86_64 CentOS-7.4.1708 - CentOSPlus enabled: 92
!C7.4.1708-extras/x86_64 CentOS-7.4.1708 - Extras enabled: 448
!C7.4.1708-fasttrack/x86_64 CentOS-7.4.1708 - CentOSPlus enabled: 0
!C7.4.1708-updates/x86_64 CentOS-7.4.1708 - Updates enabled: 2,416
!base/7/x86_64 CentOS-7 - Base enabled: 10,019
base-debuginfo/x86_64 CentOS-7 - Debuginfo disabled
base-source/7 CentOS-7 - Base Sources disabled
c7-media CentOS-7 - Media disabled
centosplus/7/x86_64 CentOS-7 - Plus disabled
centosplus-source/7 CentOS-7 - Plus Sources disabled
cr/7/x86_64 CentOS-7 - cr disabled
!elrepo ELRepo.org Community Enterprise Linux Repository - el7 enabled: 124
elrepo-extras ELRepo.org Community Enterprise Linux Extras Repository - el7 disabled
elrepo-kernel ELRepo.org Community Enterprise Linux Kernel Repository - el7 disabled
elrepo-testing ELRepo.org Community Enterprise Linux Testing Repository - el7 disabled
!epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 enabled: 13,352
epel-debuginfo/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 - Debug disabled
epel-source/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 - Source disabled
epel-testing/x86_64 Extra Packages for Enterprise Linux 7 - Testing - x86_64 disabled
epel-testing-debuginfo/x86_64 Extra Packages for Enterprise Linux 7 - Testing - x86_64 - Debug disabled
epel-testing-source/x86_64 Extra Packages for Enterprise Linux 7 - Testing - x86_64 - Source disabled
!extras/7/x86_64 CentOS-7 - Extras enabled: 435
extras-source/7 CentOS-7 - Extras Sources disabled
fasttrack/7/x86_64 CentOS-7 - fasttrack disabled
!ius/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 enabled: 676
ius-archive/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 - Archive disabled
ius-archive-debuginfo/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 - Archive Debug disabled
ius-archive-source IUS Community Packages for Enterprise Linux 7 - x86_64 - Archive Source disabled
ius-debuginfo/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 - Debug disabled
ius-dev/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 - Dev disabled
ius-dev-debuginfo/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 - Dev Debug Info disabled
ius-dev-source IUS Community Packages for Enterprise Linux 7 - x86_64 - Dev Source disabled
ius-source IUS Community Packages for Enterprise Linux 7 - x86_64 - Source disabled
ius-testing/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 - Testing disabled
ius-testing-debuginfo/x86_64 IUS Community Packages for Enterprise Linux 7 - x86_64 - Testing Debug disabled
ius-testing-source IUS Community Packages for Enterprise Linux 7 - x86_64 - Testing Source disabled
!rpmfusion-free-updates/x86_64 RPM Fusion for EL 7 - Free - Updates enabled: 247
rpmfusion-free-updates-debuginfo/x86_64 RPM Fusion for EL 7 - Free - Updates Debug disabled
rpmfusion-free-updates-source/x86_64 RPM Fusion for EL 7 - Free - Updates Source disabled
rpmfusion-free-updates-testing/x86_64 RPM Fusion for EL 7 - Free - Test Updates disabled
rpmfusion-free-updates-testing-debuginfo/x86_64 RPM Fusion for EL 7 - Free - Test Updates Debug disabled
rpmfusion-free-updates-testing-source/x86_64 RPM Fusion for EL 7 - Free - Test Updates Source disabled
!rpmfusion-nonfree-updates/x86_64 RPM Fusion for EL 7 - Nonfree - Updates enabled: 75
rpmfusion-nonfree-updates-debuginfo/x86_64 RPM Fusion for EL 7 - Nonfree - Updates Debug disabled
rpmfusion-nonfree-updates-source/x86_64 RPM Fusion for EL 7 - Nonfree - Updates Source disabled
rpmfusion-nonfree-updates-testing/x86_64 RPM Fusion for EL 7 - Nonfree - Test Updates disabled
rpmfusion-nonfree-updates-testing-debuginfo/x86_64 RPM Fusion for EL 7 - Nonfree - Test Updates Debug disabled
rpmfusion-nonfree-updates-testing-source/x86_64 RPM Fusion for EL 7 - Nonfree - Test Updates Source disabled
!updates/7/x86_64 CentOS-7 - Updates enabled: 2,500
updates-source/7 CentOS-7 - Updates Sources disabled
!webtatic/x86_64 Webtatic Repository EL7 - x86_64 enabled: 523
webtatic-archive/x86_64 Webtatic Repository EL7 - x86_64 - Archive disabled
webtatic-archive-debuginfo/x86_64 Webtatic Repository EL7 - x86_64 - Archive Debug disabled
webtatic-archive-source Webtatic Repository EL7 - x86_64 - Archive Source disabled
webtatic-debuginfo/x86_64 Webtatic Repository EL7 - x86_64 - Debug disabled
webtatic-source Webtatic Repository EL7 - x86_64 - Source disabled
webtatic-testing/x86_64 Webtatic Repository EL7 - x86_64 - Testing disabled
webtatic-testing-debuginfo/x86_64 Webtatic Repository EL7 - x86_64 - Testing Debug disabled
webtatic-testing-source Webtatic Repository EL7 - x86_64 - Testing Source disabled
repolist: 86,071
どうなりますか？この問題をどのように解決できますか？
答え1
有効にできますが、detarpmリポジトリによっては必須ではありません。
試してみてください。
yum --setopt=deltarpm=0 repolist all
答え2
これは問題に対する部分的な解決策です。時間が経つと更新するつもりですみんな答え。
私の場合（ほとんどの場合）のように、バージョン固有のリポジトリが問題の原因である場合は、そのリポジトリを無効にする必要があります。
ランニングyum -v repolist。このような行が見えます。
Repo-id : C7.0.1406-base/x86_64
Repo-name : CentOS-7.0.1406 - Base
Repo-revision: 1404489580
Repo-updated : Fri Jul 4 17:01:07 2014
Repo-pkgs : 8,465
Repo-size : 5.8 G
Repo-baseurl : http://vault.centos.org/7.0.1406/os/x86_64/
Repo-expire : 21,600 second(s) (last: Thu Aug 22 13:32:14 2019)
Filter : read-only:present
Repo-filename: /etc/yum.repos.d/CentOS-Vault.repo
Repo-id : C7.0.1406-centosplus/x86_64
Repo-name : CentOS-7.0.1406 - CentOSPlus
Repo-revision: 1428416958
Repo-updated : Tue Apr 7 15:29:37 2015
Repo-pkgs : 123
Repo-size : 673 M
Repo-baseurl : http://vault.centos.org/7.0.1406/centosplus/x86_64/
Repo-expire : 21,600 second(s) (last: Thu Aug 22 13:32:14 2019)
Filter : read-only:present
Repo-filename: /etc/yum.repos.d/CentOS-Vault.repo
C7.0.1406-baseなどのバージョン固有のRepo-idとRepoファイル名/etc/yum.repos.d/CentOS-Vault.repoを参照してください。 /etc/yum.repos.d/CentOS-Vault.repo ファイルを開きます。次のようになります。
# CentOS Vault contains rpms from older releases in the CentOS-7
# tree.
#c7.0.1406
[C7.0.1406-base]
name=CentOS-7.0.1406 - Base
baseurl=http://vault.centos.org/7.0.1406/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
enabled=0に変更enabled=1