Updating your container using Yellowdog Updater, Modified (YUM)

Complete the following steps to use Yellowdog Updater, Modified (YUM) to update your container:

Connect to the container that requires updating:
With Docker:
```
docker exec -it container_id bash
```
With Podman:
```
podman exec -it container_id bash
```
Edit the YUM configuration file:
If you need a proxy server only, without a user, add the following line to the [main] section of the /etc/yum.conf.
```
PROXY=http://your.proxy.server:port
```
If the proxy requires a user name and password, add the following lines to the yum.conf file.
```
proxy_username=yum-user 
proxy_password=yum-user-password 
```

Save the repository.

cd /etc/yum.repos.d

mv hv.repo hv.repo.old

touch hv.repo

Copy the following contents to /etc/yum.repos.d/oracle-linux-ol7.repo:

[ol7_latest]
name=Oracle Linux $releasever Latest ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=1
[ol7_u0_base]
name=Oracle Linux $releasever GA installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/0/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u1_base]
name=Oracle Linux $releasever Update 1 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/1/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u2_base]
name=Oracle Linux $releasever Update 2 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/2/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u3_base]
name=Oracle Linux $releasever Update 3 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/3/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u4_base]
name=Oracle Linux $releasever Update 4 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/4/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u5_base]
name=Oracle Linux $releasever Update 5 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/5/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u6_base]
name=Oracle Linux $releasever Update 6 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/6/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u7_base]
name=Oracle Linux $releasever Update 7 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/7/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u8_base]
name=Oracle Linux $releasever Update 8 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/8/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u9_base]
name=Oracle Linux $releasever Update 9 installation media copy ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/9/base/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_optional_latest]
name=Oracle Linux $releasever Optional Latest ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/optional/latest/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_addons]
name=Oracle Linux $releasever Add ons ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/addons/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_MODRHCK]
name=Latest RHCK with fixes from Oracle for Oracle Linux $releasever ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/MODRHCK/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
priority=20
enabled=0
[ol7_leapp]
name=Leapp Upgrade Utilities for Oracle Linux $releasever ($basearch)
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/leapp/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_latest_archive]
name=Oracle Linux $releasever Latest ($basearch) - Archive
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/latest/archive/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_optional_archive]
name=Oracle Linux $releasever Optional ($basearch) - Archive
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/optional/archive/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_security_validation]
name=Oracle Linux $releasever Update 3 ($basearch) Security Validations
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/security/validation/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0
[ol7_u8_security_validation]
name=Oracle Linux $releasever Update 8 ($basearch) Security Validations
baseurl=https://yum$ociregion.$ocidomain/repo/OracleLinux/OL7/8/security/validation/$basearch/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
gpgcheck=1
enabled=0

Perform software updates.
```
yum install bind-utils
```
Note: If the host name of the yum repository is resolved in IPv6, the container cannot connect to the repository and the yum command may fail. In that case, add the following line to the [main] section of the /etc/yum.conf file:
ip_resolve=4

Validate the domain.

nslookup

[root@hid yum.repos.d]# nslookup example.com
Server: 172.17.24.20
Address: 172.17.24.20#53

Non-authoritative answer:
Name: example.com
Address: 10.7.42.0
Name: example.com
Address: 10.7.7.33

Your container is updated.