jay*_*ren 12 ubuntu apt package-management apt-file
apt-file update有谁知道为什么 apt-file 即使运行后也会报告缓存为空apt update？
[pop-os ~][I]% apt-file search /usr/lib/android-sdk/tools/bin/sdkmanager
E: The cache is empty. You need to run "apt update" first.
[pop-os ~][I]% apt-file update
Reading package lists... Done
E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)
E: Unable to lock directory /var/lib/apt/lists/
W: Problem unlinking the file /var/cache/apt/pkgcache.bin - RemoveCaches (13: Permission denied)
W: Problem unlinking the file /var/cache/apt/srcpkgcache.bin - RemoveCaches (13: Permission denied)
[pop-os ~][I]% sudo !!
sudo apt-file update
Hit:1 http://apt.pop-os.org/proprietary cosmic InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu cosmic InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu cosmic-updates InRelease
Hit:4 http://ppa.launchpad.net/nextcloud-devs/client/ubuntu cosmic InRelease
Hit:5 http://us.archive.ubuntu.com/ubuntu cosmic-security InRelease
Hit:6 http://repository.spotify.com stable InRelease
Hit:7 http://us.archive.ubuntu.com/ubuntu cosmic-backports InRelease
Get:8 http://apt.pop-os.org/proprietary cosmic all Contents (deb) [102 kB]
Hit:9 http://ppa.launchpad.net/system76/pop/ubuntu cosmic InRelease
Get:10 http://us.archive.ubuntu.com/ubuntu cosmic amd64 Contents (deb) [40.9 MB]
Get:11 http://apt.pop-os.org/proprietary cosmic i386 Contents (deb) [276 B]
Get:12 http://apt.pop-os.org/proprietary cosmic amd64 Contents (deb) [2,605 kB]
Get:13 http://us.archive.ubuntu.com/ubuntu cosmic i386 Contents (deb) [40.2 MB]
Get:14 http://us.archive.ubuntu.com/ubuntu cosmic-updates i386 Contents (deb) [5,178 kB]
Get:15 http://us.archive.ubuntu.com/ubuntu cosmic-updates amd64 Contents (deb) [6,997 kB]
Get:16 http://us.archive.ubuntu.com/ubuntu cosmic-security i386 Contents (deb) [3,784 kB]
Get:17 http://us.archive.ubuntu.com/ubuntu cosmic-security amd64 Contents (deb) [5,296 kB]
Get:18 http://us.archive.ubuntu.com/ubuntu cosmic-backports amd64 Contents (deb) [3,773 B]
Get:19 http://us.archive.ubuntu.com/ubuntu cosmic-backports i386 Contents (deb) [3,772 B]
Fetched 105 MB in 21s (4,952 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
148 packages can be upgraded. Run 'apt list --upgradable' to see them.
sudo -E apt-file update 20.30s user 1.16s system 95% cpu 22.585 total
[pop-os ~][I]% apt-file search /usr/lib/android-sdk/tools/bin/sdkmanager
E: The cache is empty. You need to run "apt update" first.
[pop-os ~][I]% apt update
Reading package lists... Done
E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)
E: Unable to lock directory /var/lib/apt/lists/
W: Problem unlinking the file /var/cache/apt/pkgcache.bin - RemoveCaches (13: Permission denied)
W: Problem unlinking the file /var/cache/apt/srcpkgcache.bin - RemoveCaches (13: Permission denied)
[pop-os ~][I]% sudo !!
sudo apt update
Hit:1 http://apt.pop-os.org/proprietary cosmic InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu cosmic InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu cosmic-updates InRelease
Hit:4 http://us.archive.ubuntu.com/ubuntu cosmic-security InRelease
Hit:5 http://ppa.launchpad.net/nextcloud-devs/client/ubuntu cosmic InRelease
Hit:6 http://us.archive.ubuntu.com/ubuntu cosmic-backports InRelease
Get:7 http://apt.pop-os.org/proprietary cosmic i386 Contents (deb) [276 B]
Hit:8 http://repository.spotify.com stable InRelease
Get:9 http://apt.pop-os.org/proprietary cosmic all Contents (deb) [102 kB]
Hit:10 http://ppa.launchpad.net/system76/pop/ubuntu cosmic InRelease
Get:11 http://us.archive.ubuntu.com/ubuntu cosmic amd64 Contents (deb) [40.9 MB]
Get:12 http://apt.pop-os.org/proprietary cosmic amd64 Contents (deb) [2,605 kB]
Get:13 http://us.archive.ubuntu.com/ubuntu cosmic i386 Contents (deb) [40.2 MB]
Get:14 http://us.archive.ubuntu.com/ubuntu cosmic-updates i386 Contents (deb) [5,178 kB]
Get:15 http://us.archive.ubuntu.com/ubuntu cosmic-updates amd64 Contents (deb) [6,997 kB]
Get:16 http://us.archive.ubuntu.com/ubuntu cosmic-security amd64 Contents (deb) [5,296 kB]
Get:17 http://us.archive.ubuntu.com/ubuntu cosmic-security i386 Contents (deb) [3,784 kB]
Get:18 http://us.archive.ubuntu.com/ubuntu cosmic-backports i386 Contents (deb) [3,772 B]
Get:19 http://us.archive.ubuntu.com/ubuntu cosmic-backports amd64 Contents (deb) [3,773 B]
Fetched 105 MB in 21s (4,963 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
148 packages can be upgraded. Run 'apt list --upgradable' to see them.
sudo -E apt update 20.24s user 1.15s system 95% cpu 22.470 total
[pop-os ~][I]% apt-file search /usr/lib/android-sdk/tools/bin/sdkmanager
E: The cache is empty. You need to run "apt update" first.
[pop-os ~][I]% sudo !!
sudo apt-file search /usr/lib/android-sdk/tools/bin/sdkmanager
E: The cache is empty. You need to run "apt update" first.
Distro 是 Pop!_OS（Ubuntu 的衍生版本），但我找不到 Pop!_OS 标签。
我能够通过清除/var/lib/apt/lists/然后再次更新 apt 在 Pop!_OS 22.04 上修复此问题：
sudo rm -rf /var/lib/apt/lists/*_*
sudo apt-get update
apt-file search sdkmanager
我在这里找到提示：https://unix.stackexchange.com/a/575356/243015
编辑：运行apt-get install <foo>apt-file 后再次退出工作。