Tag Archives: cannot

Resolving yum source-related issues: Cannot retrieve metalink for repository: epel/x86_64. Please verify its path and try again

Loaded plug-ins: fastestmirror
Loading mirror speeds from cached hostfile
One of the configured repositories failed (none),
and yum doesn’t have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work “fix” this:

 1. Contact the upstream for the repository and get them to fix the problem.

 2. Reconfigure the baseurl/etc. for the repository, to point to a working
    upstream. This is most often useful if you are using a newer
    distribution release than is supported by the repository (and the
    packages for the previous distribution release still work).

 3. Run the command with the repository temporarily disabled
        yum --disablerepo=<repoid> ...

 4. Disable the repository permanently, so yum won't use it by default. Yum
    will then just ignore the repository until you permanently enable it
    again or use --enablerepo for temporary usage:

        yum-config-manager --disable <repoid>
    or
        subscription-manager repos --disable=<repoid>

 5. Configure the failing repository to be skipped, if it is unavailable.
    Note that yum will try to contact the repo. when it runs most commands,
    so will have to try and fail each time (and thus. yum will be be much
    slower). If it is a very temporary problem though, this is often a nice
    compromise:

        yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot retrieve metalink for repository: epel/x86_64. Please verify its path and try again


Follow the prompts to correct the source.

cd /etc/yum.repos.d
vi epel.repo 

The revised contents are as follows:

[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=http://mirrors.aliyun.com/epel/7/$basearch
#metalink=https://mirrors.aliyun.com/metalink?repo=epel-7&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
baseurl=http://mirrors.aliyun.com/epel/7/$basearch/debug
#metalink=https://mirrors.aliyun.com/metalink?repo=epel-debug-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1

[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
baseurl=http://mirrors.aliyun.com/epel/7/SRPMS
#metalink=https://mirrors.aliyun.com/metalink?repo=epel-source-7&arch=$basearch
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1

Execute the following command:

yum clean all
yum makecache
yum update
yum install -y git

Yum installation and use returned to normal.

Vs2019: solution nvcc total: cannot find compiler‘ cl.exe ‘ in PATH

vs2019:nvcc fatal : Cannot find compiler ‘ cl.exe ‘ in PATH

Three steps:

    Step 1:
    add the following two positions to the nameless variable path list of system variables
    Step 2:
    create a new variable named Lib, add three locations for it: C: program files (x86), Microsoft Visual Studio, 2019, community, VC, tools, MSVC, 14.27.29110, lib, x64
    C: program files (x86), windows kits, 10, lib, 10.0.18362.0, ucrt, x64
    C: Program files (x86), windows kits, 10, lib, 10.0.18362.0, um, x64 step 3:
    create a new variable named include in the system variable, and add 2 Location: C: program files (x86) – Microsoft Visual Studio (2019) – Community (VC) – tools – MSVC (14.27.29110) – include
    C: program files (x86) – Windows kits (10) – lib (10.0.18362.0) – ucrt

Reference article: http://iliutong.cn/2019/01/20/nvcc-cu-file-in-console-in-windows/