[리눅스] yum 명령어 안될 때 "could not retrieve mirrorlist"

테스트 환경에서 yum이 실행되지 않았던 부분에 대해서 간단하게 설명드리려 합니다.

 

yum command error

1. 에러 확인

# 외부로 ping도 잘 나가는 상황 [root@localhost ~]# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=115 time=36.7 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=115 time=36.8 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=115 time=37.0 ms 64 bytes from 8.8.8.8: icmp_seq=4 ttl=115 time=36.2 ms --- 8.8.8.8 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3006ms rtt min/avg/max/mdev = 36.260/36.726/37.008/0.313 ms # yum 명령어를 실행하니 " Could not retrieve mirrorlist ~ " 오류가 발생하였습니다. [root@localhost ~]# yum list telnet Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile Could not retrieve mirrorlist mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 알 수 없는 오류"  One of the configured repositories failed (Unknown),  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 find a valid baseurl for repo: base/7/x86_64

 

 

문제 해결

1. nameserver 확인

# nameserver를 확인하세요. 기본적으로 서버에서 네임서버를 조회하지 못한다면 당연히 yum 실행이 안될 수 있습니다. # 수정 전 (아무런 값이 안나옴) [root@localhost ~]# cat /etc/resolv.conf   // DNS 설정 하는 걸 깜빡했었다.  # 수정 후 [root@localhost ~]# cat /etc/resolv.conf nameserver 8.8.8.8 [root@localhost ~]# yum list telnet   // 정상적으로 실행이 됩니다. Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile  * base: mirror.kakao.com  * extras: mirror.kakao.com  * updates: mirror.kakao.com base                                                     | 3.6 kB     00:00 extras                                                   | 2.9 kB     00:00 updates                                                  | 2.9 kB     00:00 (1/4): base/7/x86_64/group_gz                              | 153 kB   00:00 (2/4): extras/7/x86_64/primary_db                          | 206 kB   00:00 (3/4): updates/7/x86_64/primary_db                         | 4.5 MB   00:00 (4/4): base/7/x86_64/primary_db                            | 6.1 MB   00:01 Available Packages telnet.x86_64                      1:0.17-65.el7_8                       updates

 

2. network 설정 파일 확인

# ifcfg-xxx 파일 확인 [root@localhost ~]# cat /etc/sysconfig/network-script/ifcfg-enp0s3 TYPE=Ethernet PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=static DEFROUTE=yes IPV4_FAILURE_FATAL=no NAME=enp0s3 UUID=4c2778dc-5757-412f-b55c-550a3130009b DEVICE=enp0s3 ONBOOT=yes  // no → yes 변경 IPADDR=192.168.200.192 GATEWAY=192.168.200.254 NETMASK=255.255.255.0 DNS=8.8.8.8  // DNS 설정이 되어 있는지 확인