Does anyone know what's the difference between the below command in CentOS Linux ?:
dnf update
yum update
Which one is better to use with Cron as automated OS update?
Thanks in advance.
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yum was replaced with dnf in CentOS 8. The command yum still exists because people will still remember it for years to come. The only thing it does is to call dnf.
[root@localhost ~]# ls -l /usr/bin/yum
lrwxrwxrwx. 1 root root 5 Jul 21 18:46 /usr/bin/yum -> dnf-3
[root@localhost ~]# file /usr/bin/yum
/usr/bin/yum: symbolic link to dnf-3
Michael Hampton
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Hi Mike, so in this case, it would be better to use dnf-3 command? – Senior Systems Engineer Aug 27 '20 at 02:07
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@SeniorSystemsEngineer You should use `dnf`, this is the canonical command. Here `dnf-3` means only that it is the version for Python 3. There was a Python 2 version early on that was named `dnf-2` but it was obsoleted before RHEL 8 release. – Michael Hampton Aug 27 '20 at 02:14
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that's great, many thanks Mike ! – Senior Systems Engineer Aug 27 '20 at 04:23
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Is this similar to the situation with `apt` and `apt-get` in Ubuntu (since 16.04 LTS, I believe)? – wyphan Dec 30 '20 at 19:39
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1@wyphan Not exactly. `apt` and `apt-get` are subtly different. `dnf` entirely replaced `yum`. – Michael Hampton Dec 30 '20 at 20:23