I'm getting an error message when trying to back up the Craft DB.
2019-09-04 10:21:09 [-][1][6eba342acf082a62ea47300d68faddf4][error][yii\base\Exception] yii\base\Exception: Could not create backup: The shell command "mysqldump --defaults-extra-file="/var/www/html/storage/runtime/temp/my.cnf" --add-drop-table --comments --create-options --dump-date --no-autocommit --routines --set-charset --triggers --single-transaction --no-data --result-file="/var/www/html/storage/backups/client-name_190904_172109_fnrhjpwxac_v3.2.10.sql" craft && mysqldump --defaults-extra-file="/var/www/html/storage/runtime/temp/my.cnf" --add-drop-table --comments --create-options --dump-date --no-autocommit --routines --set-charset --triggers --no-create-info --ignore-table=craft.assetindexdata --ignore-table=craft.assettransformindex --ignore-table=craft.sessions --ignore-table=craft.templatecaches --ignore-table=craft.templatecachequeries --ignore-table=craft.templatecacheelements --ignore-table=craft.cache --ignore-table=craft.templatecachecriteria craft >> "/var/www/html/storage/backups/client-name_190904_172109_fnrhjpwxac_v3.2.10.sql"" failed with exit code 127: sh: 1: mysqldump: not found in /var/www/html/vendor/craftcms/cms/src/controllers/UtilitiesController.php:343
I'm not sure where to look to solve this. How may I get the DB to back up?