~# plesk installer install-panel-updates
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Checking for installed packages...
ERROR: The product 'plesk' is not installed yet.
exit status 1
# plesk installer --show-all-releases
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Downloading file php72.inf3: 100% was finished.
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Downloading file php70.inf3: 100% was finished.
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Downloading file php56.inf3: 100% was finished.
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Downloading file php55.inf3: 100% was finished.
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Downloading file php54.inf3: 100% was finished.
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Downloading file php52.inf3: 100% was finished.
Checking for installed packages...
--- prod_id release_id (description) (tiers) ---
plesk PLESK_18_0_44 (Plesk Obsidian 18.0.44) (stable,development,current,testing,release)
plesk PLESK_18_0_41 (Plesk Obsidian 18.0.41) (stable,development,current,testing,release)
plesk PLESK_18_0_34 (Plesk Obsidian 18.0.34) (stable,development,current,testing,release)
plesk PLESK_18_0_31 (Plesk Obsidian 18.0.31) (stable,development,current,testing,release)
plesk PLESK_18_0_28 (Plesk Obsidian 18.0.28) (stable,development,current,testing,release)
plesk PLESK_7_1_7 (Plesk 7.1.7) (stable)