Unable to Locate yum During Patch Operation on Ubuntu 20.04 Instance

While executing a patch operation on an Ubuntu 20.04 instance using AWS Systems Manager, I encountered a warning indicating that the yum package manager could not be located. This warning appears in the logs, despite the patch operation being intended for an Ubuntu instance, which should use apt instead of yum.

/usr/bin/python3 /usr/bin/apt-get Reading package lists... Building dependency tree... Reading state information... python3-apt is already the newest version (2.0.1ubuntu0.20.04.1). 0 upgraded, 0 newly installed, 0 to remove and 77 not upgraded. Using python binary: 'python3' Using Python Version: Python 3.8.10 06/12/2024 06:08:43 root [INFO]: Downloading payload from https://s3.ap-south-1.amazonaws.com/aws-ssm-ap-south-1/patchbaselineoperations/linux/payloads/patch-baseline-operations-1.126.tar.gz 06/12/2024 06:08:43 root [INFO]: Attempting to import entrance file os_selector 06/12/2024 06:08:44 root [INFO]: Running with snapshot id = xxxxxxx and operation = Install 06/12/2024 06:08:44 root [INFO]: Instance Id: xxxxxxx 06/12/2024 06:08:44 root [INFO]: Region: ap-south-1 06/12/2024 06:08:44 root [INFO]: Product: Ubuntu20.04 06/12/2024 06:08:44 root [INFO]: Patch Group: 06/12/2024 06:08:44 root [INFO]: Operation type: Install 06/12/2024 06:08:44 root [INFO]: Snapshot Id: xxxxxxxxxxxx 06/12/2024 06:08:44 root [INFO]: Patch Baseline: {'accountId': 'xxxxxxxx', 'baselineId': 'pb-0298bd22278af6352', 'name': 'AWS-UbuntuDefaultPatchBaseline', 'globalFilters': {'filters': [{'key': 'PRODUCT', 'values': ['']}]}, 'approvalRules': {'rules': [{'filterGroup': {'filters': [{'key': 'PRIORITY', 'values': ['Required', 'Important', 'Standard', 'Optional', 'Extra']}]}, 'complianceLevel': 'UNSPECIFIED', 'enableNonSecurity': False, 'approveAfterDays': 7, 'approveUntilDate': None}]}, 'approvedPatches': [], 'approvedPatchesComplianceLevel': 'UNSPECIFIED', 'approvedPatchesEnableNonSecurity': False, 'rejectedPatches': [], 'rejectedPatchesAction': 'ALLOW_AS_DEPENDENCY', 'createdTime': 1525398349.566, 'modifiedTime': 1525398349.566, 'description': 'Default Patch Baseline for Ubuntu Provided by AWS.', 'operatingSystem': 'UBUNTU', 'sources': []} 06/12/2024 06:08:44 root [INFO]: Reboot Option: RebootIfNeeded 06/12/2024 06:08:44 root [INFO]: Checking if it is a Patch Policy execution. 06/12/2024 06:08:44 root [INFO]: This execution has been identified as a Patch Classic execution. 06/12/2024 06:08:44 root [WARNING]: Unable to locate yum, code: 1. 06/12/2024 06:08:44 root [INFO]: Loading patch snapshot from snapshot.json 06/12/2024 06:08:44 root [INFO]: {'patchBaseline': {'accountId': 'xxxxxxxxx', 'baselineId': 'pb-0298bd22278af6352', 'name': 'AWS-UbuntuDefaultPatchBaseline', 'globalFilters': {'filters': [{'key': 'PRODUCT', 'values': ['']}]}, 'approvalRules': {'rules': [{'filterGroup': {'filters': [{'key': 'PRIORITY', 'values': ['Required', 'Important', 'Standard', 'Optional', 'Extra']}]}, 'complianceLevel': 'UNSPECIFIED', 'enableNonSecurity': False, 'approveAfterDays': 7, 'approveUntilDate': None}]}, 'approvedPatches': [], 'approvedPatchesComplianceLevel': 'UNSPECIFIED', 'approvedPatchesEnableNonSecurity': False, 'rejectedPatches': [], 'rejectedPatchesAction': 'ALLOW_AS_DEPENDENCY', 'createdTime': 1525398349.566, 'modifiedTime': 1525398349.566, 'description': 'Default Patch Baseline for Ubuntu Provided by AWS.', 'operatingSystem': 'UBUNTU', 'sources': []}, 'product': 'Ubuntu20.04', 'patchGroup': '', 'instanceId': xxxxxxxxx', 'region': 'ap-south-1', 'operation': 'Install', 'snapshotId': 'xxxxxxxxxxxxx', 'installOverrideList': '', 'baselineOverride': '', 'rebootOption': 'RebootIfNeeded', 'associationId': '', 'patchPolicy': False} 06/12/2024 06:08:45 root [INFO]: Reading Local Configuration file 06/12/2024 06:08:45 root [INFO]: {'accountsservice.amd64:0.6.55-0ubuntu1220.04.7': {'id': 'accountsservice.amd64', 'installedTime': 1710216155.8488934, 'state': 'Installed'}, 'amd64-microcode.amd64:3.20191218.1ubuntu1.2': {'id': 'amd64-microcode.amd64', 'installedTime': 1693493001.8252861, 'state': 'Installed'}, 'apport.amd64:2.20.11-0ubuntu27.26': {'id': 'apport.amd64', 'installedTime': 1684359712.913814, 'state': 'Installed'}, 'bash.amd64:5.0-6ubuntu1.2': {'id': 'bash.amd64', 'installedTime': 1684359682.873675, 'state': 'Installed'}, 'bind9-dnsutils.amd64:1:9.16.48-0ubuntu0.20.04.1': {'id': 'bind9-dnsutils.amd64', 'installedTime': 1708401756.9898348, 'state': 'Installed'}, 'bind9-host.amd64:1:9.16.48-0ubuntu0.20.04.1': {'id': 'bind9-host.amd64', 'installedTime': 1708401757.2858331, 'state': 'Installed'}, 'bind9-libs.amd64:1:9.16.48-0ubuntu0.20.04.1': {'id': 'bind9-libs.amd64', 'installedTime': 1708401757.2058337, 'state': 'Installed'}, 'bsdutils.amd64:1:2.34-0.1ubuntu9.6': {'id': 'bsdutils.amd64', 'installedTime': 1712904369.3818352, 'state': 'Installed'}, 'busybox-initramfs.amd64:1:1.30.1-4ubuntu6.4': {'id': 'busybox-initramfs.amd64', 'installedTime': 1684359713.1818151, 'state': 'Installed'}, 'busybox-static.amd64:1:1.30.1-4ubuntu6.4': {'id': 'busybox-static.amd64', 'installedTime': 1684359710.5258029, 'state': 'Installed'}, 'ca-certificates.amd64:20230311ubuntu0.20.04.1': {'id': 'ca-certificates.amd64', 'installedTime': 1686131543.4367874, 'state': 'Installed'}, 'cloud-init.amd64:23.1.2-0ubuntu020.04.2': {'id': 'cloud-init.amd64', 'installedTime': 1686131505.136671, 'state': 'Installed'}, 'cpio.amd64:2.13+dfsg-2ubuntu0.4': {'id': 'cpio.amd64', 'installedTime': 1714449757.9489598, 'state': 'Installed'}, 'cryptsetup.amd64:2:2.2.2-3ubuntu2.4': {'id': 'cryptsetup.amd64', 'installedTime': 1684359713.389816, 'state': 'Installed'}, 'cryptsetup-bin.amd64:2:2.2.2-3ubuntu2.4': {'id': 'cryptsetup-bin.amd64', 'installedTime': 1684359713.357816, 'state': 'Installed'}, 'cryptsetup-initramfs.amd64:2:2.2.2-3ubuntu2.4': {'id': 'cryptsetup-initramfs.amd64', 'installedTime': 1684359713.573817, 'state': 'Installed'}, 'cryptsetup-run.amd64:2:2.2.2-3ubuntu2.4': {'id': 'cryptsetup-run.amd64', 'installedTime': 1684359713.589817, 'state': 'Installed'}, 'curl.amd64:7.68.0-1ubuntu2.22': {'id': 'curl.amd64', 'installedTime': 1711607896.6307547, 'state': 'Installed'}, 'dbus.amd64:1.12.16-2ubuntu2.3': {'id': 'dbus.amd64', 'installedTime': 1684359685.393687, 'state': 'Installed'}, 'dbus-user-session.amd64:1.12.16-2ubuntu2.3': {'id': 'dbus-user-session.amd64', 'installedTime': 1684359714.1138194, 'state': 'Installed'}, 'dirmngr.amd64:2.2.19-3ubuntu2.2': {'id': 'dirmngr.amd64', 'installedTime': 1684359714.3138204, 'state': 'Installed'}, 'distro-info-data.amd64:0.43ubuntu1.16': {'id': 'distro-info-data.amd64', 'installedTime': 1715054562.2078092, 'state': 'Installed'}, 'dpkg.amd64:1.19.7ubuntu3.2': {'id': 'dpkg.amd64', 'installedTime': 1684359683.0896761, 'state': 'Installed'}, 'e2fsprogs.amd64:1.45.5-2ubuntu1.1': {'id': 'e2fsprogs.amd64', 'installedTime': 1684359687.0816948, 'state': 'Installed'}, 'fdisk.amd64:2.34-0.1ubuntu9.6': {'id': 'fdisk.amd64', 'installedTime': 1712904348.4099543, 'state': 'Installed'}, 'gawk.amd64:1:5.0.1+dfsg-1ubuntu0.1': {'id': 'gawk.amd64', 'installedTime': 1694844900.110117, 'state': 'Installed'}, 'gcc-10-base.amd64:10.5.0-1ubuntu120.04': {'id': 'gcc-10-base.amd64', 'installedTime': 1690958092.057493, 'state': 'Installed'}, 'ghostscript.amd64:9.50dfsg-5ubuntu4.11': {'id': 'ghostscript.amd64', 'installedTime': 1697696337.2175422, 'state': 'Installed'}, 'gir1.2-packagekitglib-1.0.amd64:1.1.13-2ubuntu1.1': {'id': 'gir1.2-packagekitglib-1.0.amd64', 'installedTime': 1684359715.5698261, 'state': 'Installed'}, 'git.amd64:1:2.25.1-1ubuntu3.11': {'id': 'git.amd64', 'installedTime': 1684359716.0458283, 'state': 'Installed'}, 'git-man.amd64:1:2.25.1-1ubuntu3.11': {'id': 'git-man.amd64', 'installedTime': 1684359715.6658266, 'state': 'Installed'}, 'glib-networking.amd64:2.64.2-1ubuntu0.1': {'id': 'glib-networking.amd64', 'installedTime': 1684359716.1338286, 'state': 'Installed'}, 'glib-networking-common.amd64:2.64.2-1ubuntu0.1': {'id': 'glib-networking-common.amd64', 'installedTime': 1684359716.0818286, 'state': 'Installed'}, 'glib-networking-services.amd64:2.64.2-1ubuntu0.1': {'id': 'glib-networking-services.amd64', 'installedTime': 1684359716.0938287, 'state': 'Installed'}, 'gnupg.amd64:2.2.19-3ubuntu2.2': {'id': 'gnupg.amd64', 'installedTime': 1684359714.865823, 'state': 'Installed'}, 'gnupg-l10n.amd64:2.2.19-3ubuntu2.2': {'id': 'gnupg-l10n.amd64', 'installedTime': 1684359714.5978217, 'state': 'Installed'}, 'gnupg-utils.amd64:2.2.19-3ubuntu2.2': {'id': 'gnupg-utils.amd64', 'installedTime': 1684359714.653822, 'state': 'Installed'}, 'gpg.amd64:2.2.19-3ubuntu2.2': {'id': 'gpg.amd64', 'installedTime': 1684359714.7098222, 'state': 'Installed'}, 'gpg-agent.amd64:2.2.19-3ubuntu2.2': {'id': 'gpg-agent.amd64', 'installedTime': 1684359714.7618225, 'state': 'Installed'}, 'gpg-wks-client.amd64:2.2.19-3ubuntu2.2': {'id': 'gpg-wks-client.amd64', 'installedTime': 1684359714.7858226, 'state': 'Installed'}, 'gpg-wks-server.amd64:2.2.19-3ubuntu2.2': {'id': 'gpg-wks-server.amd64', 'installedTime': 1684359714.8058226, 'state': 'Installed'}, 'gpgconf.amd64:2.2.19-3ubuntu2.2': {'id': 'gpgconf.amd64', 'installedTime': 1684359714.2218199, 'state': 'Installed'}, 'gpgsm.amd64:2.2.19-3ubuntu2.2': {'id': 'gpgsm.amd64', 'installedTime': 1684359714.8338227, 'state': 'Installed'}, 'gpgv.amd64:2.2.19-3ubuntu2.2': {'id': 'gpgv.amd64', 'installedTime': 1684359686.929694, 'state': 'Installed'}, 'grub-efi-amd64-bin.amd64:2.06-2ubuntu14.4': {'id': 'grub-efi-amd64-bin.amd64', 'installedTime': 1696574876.240376, 'state': 'Installed'}, 'grub-efi-amd64-signed.amd64:1.187.620.04.1+2.06-2ubuntu14.4': {'id': 'grub-efi-amd64-signed.amd64', 'installedTime': 1696574875.900374, 'state': 'Installed'}, 'gzip.amd64:1.10-0ubuntu4.1': {'id': 'gzip.amd64', 'installedTime': 1684359683.1376765, 'state': 'Installed'}, 'hibagent.amd64:1.0.1-0ubuntu1.20.04.2': {'id': 'hibagent.amd64', 'installedTime': 1700635661.8208692, 'state': 'Installed'}, 'imagemagick.amd64:8:6.9.10.23+dfsg-2.1ubuntu11.9': {'id': 'imagemagick.amd64', 'installedTime': 1689061411.7374148, 'state': 'Installed'}, 'imagemagick-6-common.amd64:8:6.9.10.23+dfsg-2.1ubuntu11.9': {'id': 'imagemagick-6-common.amd64', 'installedTime': 1689061405.6133978, 'state': 'Installed'}, 'imagemagick-6.q16.amd64:8:6.9.10.23+dfsg-2.1ubuntu11.9': {'id': 'imagemagick-6.q16.amd64', 'installedTime': 1689061411.6614146, 'state': 'Installed'}, 'intel-microcode.amd64:3.20231114.0ubuntu0.20.04.1': {'id': 'intel-microcode.amd64', 'installedTime': 1700203538.1730711, 'state': 'Installed'}, 'klibc-utils.amd64:2.0.7-1ubuntu5.2': {'id': 'klibc-utils.amd64', 'installedTime': 1713335828.440892, 'state': 'Installed'}, 'kpartx.amd64:0.8.3-1ubuntu2.1': {'id': 'kpartx.amd64', 'installedTime': 1684359725.809873, 'state': 'Installed'}, 'krb5-locales.amd64:1.17-6ubuntu4.4': {'id': 'krb5-locales.amd64', 'installedTime': 1699423654.7729385, 'state': 'Installed'}, 'less.amd64:551-1ubuntu0.3': {'id': 'less.amd64', 'installedTime': 1714449757.8729603, 'state': 'Installed'}, 'libaccountsservice0.amd64:0.6.55-0ubuntu1220.04.7': {'id': 'libaccountsservice0.amd64', 'installedTime': 1710216155.9688926, 'state': 'Installed'}, 'libarchive13.amd64:3.4.0-2ubuntu1.2': {'id': 'libarchive13.amd64', 'installedTime': 1684359715.0018237, 'state': 'Installed'}, 'libasn1-8-heimdal.amd64:7.7.0+dfsg-1ubuntu1.4': {'id': 'libasn1-8-heimdal.amd64', 'installedTime': 1684359713.6898174, 'state': 'Installed'}, 'libatomic1.amd64:10.5.0-1ubuntu120.04': {'id': 'libatomic1.amd64', 'installedTime': 1695640745.2900758, 'state': 'Installed'}, 'libavahi-client3.amd64:0.7-4ubuntu7.3': {'id': 'libavahi-client3.amd64', 'installedTime': 1700549291.2376688, 'state': 'Installed'}, 'libavahi-common-data.amd64:0.7-4ubuntu7.3': {'id': 'libavahi-common-data.amd64', 'installedTime': 1700549305.6458228, 'state': 'Installed'}, 'libavahi-common3.amd64:0.7-4ubuntu7.3': {'id': 'libavahi-common3.amd64', 'installedTime': 1700549298.925751, 'state': 'Installed'}, 'libblkid1.amd64:2.34-0.1ubuntu9.6': {'id': 'libblkid1.amd64', 'installedTime': 1712904333.7740374, 'state': 'Installed'}, 'libbrotli1.amd64:1.0.7-6ubuntu0.1': {'id': 'libbrotli1.amd64', 'installedTime': 1684359713.6298172, 'state': 'Installed'}, 'libc-bin.amd64:2.31-0ubuntu9.15': {'id': 'libc-bin.amd64', 'installedTime': 1713509277.1804895, 'state': 'Installed'}, 'libc6.amd64:2.31-0ubuntu9.15': {'id': 'libc6.amd64', 'installedTime': 1713509296.2723846, 'state': 'Installed'}, 'libcap2.amd64:1:2.32-1ubuntu0.1': {'id': 'libcap2.amd64', 'installedTime': 1686898522.1217496, 'state': 'Installed'}, 'libcap2-bin.amd64:1:2.32-1ubuntu0.1': {'id': 'libcap2-bin.amd64', 'installedTime': 1686898508.9615521, 'state': 'Installed'}, 'libcom-err2.amd64:1.45.5-2ubuntu1.1': {'id': 'libcom-err2.amd64', 'installedTime': 1684359687.9256985, 'state': 'Installed'}, 'libcryptsetup12.amd64:2:2.2.2-3ubuntu2.4': {'id': 'libcryptsetup12.amd64', 'installedTime': 1684359685.5376875, 'state': 'Installed'}, 'libcups2.amd64:2.3.1-9ubuntu1.6': {'id': 'libcups2.amd64', 'installedTime': 1695276438.5974667, 'state': 'Installed'}, 'libcurl3-gnutls.amd64:7.68.0-1ubuntu2.22': {'id': 'libcurl3-gnutls.amd64', 'installedTime': 1711607875.294878, 'state': 'Installed'}, 'libcurl4.amd64:7.68.0-1ubuntu2.22': {'id': 'libcurl4.amd64', 'installedTime': 1711607896.7267542, 'state': 'Installed'}, 'libdbus-1-3.amd64:1.12.16-2ubuntu2.3': {'id': 'libdbus-1-3.amd64', 'installedTime': 1684359685.4216871, 'state': 'Installed'}, 'libdjvulibre-text.amd64:3.5.27.1-14ubuntu0.1': {'id': 'libdjvulibre-text.amd64', 'installedTime': 1689061412.2454164, 'state': 'Installed'}, 'libdjvulibre21.amd64:3.5.27.1-14ubuntu0.1': {'id': 'libdjvulibre21.amd64', 'installedTime': 1689061412.3694167, 'state': 'Installed'}, 'libdrm-common.amd64:2.4.107-8ubuntu120.04.2': {'id': 'libdrm-common.amd64', 'installedTime': 1684359709.1217966, 'state': 'Installed'}, 'libdrm2.amd64:2.4.107-8ubuntu120.04.2': {'id': 'libdrm2.amd64', 'installedTime': 1684359709.1377966, 'state': 'Installed'}, 'libelf1.amd64:0.176-1.1ubuntu0.1': {'id': 'libelf1.amd64', 'installedTime': 1693493001.705286, 'state': 'Installed'}, 'libexpat1.amd64:2.2.9-1ubuntu0.6': {'id': 'libexpat1.amd64', 'installedTime': 1684359685.4616873, 'state': 'Installed'}, 'libext2fs2.amd64:1.45.5-2ubuntu1.1': {'id': 'libext2fs2.amd64', 'installedTime': 1684359687.0056944, 'state': 'Installed'}, 'libfdisk1.amd64:2.34-0.1ubuntu9.6': {'id': 'libfdisk1.amd64', 'installedTime': 1712904362.717873, 'state': 'Installed'}, 'libfreetype6.amd64:2.10.1-2ubuntu0.3': {'id': 'libfreetype6.amd64', 'installedTime': 1684359716.1738288, 'state': 'Installed'}, 'libfribidi0.amd64:1.0.8-2ubuntu0.1': {'id': 'libfribidi0.amd64', 'installedTime': 1684359688.4977012, 'state': 'Installed'}, 'libgcc-s1.amd64:10.5.0-1ubuntu120.04': {'id': 'libgcc-s1.amd64', 'installedTime': 1690958092.8414953, 'state': 'Installed'}, 'libgcrypt20.amd64:1.8.5-5ubuntu1.1': {'id': 'libgcrypt20.amd64', 'installedTime': 1684359684.3976822, 'state': 'Installed'