Guest michael295007 Posted June 28, 2014 Posted June 28, 2014 I can't install mintupdate 4.5.6-1 under Linux Mint 16. When mintupdate tries to upgrade version 4.5.6 to version 4.5.6-1 the following error pops up: E: Could not open lock file /var/cache/apt/archives/lock - open (21: Is a directory) E: Could not open file descriptor -1 E: Unable to lock the download directory I tried �sudo apt-get update�, no joy. I can download the update but I can�t install it. The same error message appears. What can I do to fix this? Every suggestion is highly appreciated. Continue reading... Quote
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