Errors were encountered while processing: linux-image-4.15.0-50-generic

What is the output of:

ll /usr/lib/linux-image-4.15.0-50-generic

Thanks

$ sudo ls -l /usr/lib/linux-image-4.15.0-50-generic
ls: cannot access '/usr/lib/linux-image-4.15.0-50-generic': No such file o
r directory
$ sudo ls -l /usr/lib/
total 308
drwxr-xr-x 4 root root 4096 May 16 03:05 NetworkManager
drwxr-xr-x 29 root root 20480 May 16 03:05 aarch64-linux-gnu
drwxr-xr-x 5 root root 4096 May 16 03:03 apt
drwxr-xr-x 2 root root 4096 May 16 03:04 avahi
drwxr-xr-x 2 root root 4096 May 16 03:04 bfd-plugins
drwxr-xr-x 2 root root 4096 Apr 20 2018 binfmt.d
drwxr-xr-x 2 root root 4096 May 16 03:04 compat-ld
drwxr-xr-x 2 root root 4096 Apr 27 2018 dbus-1.0
drwxr-xr-x 3 root root 4096 Apr 27 2018 dpkg
drwxr-xr-x 2 root root 4096 Apr 27 2018 eject
drwxr-xr-x 2 root root 4096 May 16 03:02 environment.d
drwxr-xr-x 2 root root 4096 May 16 03:03 file
drwxr-xr-x 3 root root 4096 Apr 16 2018 gcc
drwxr-xr-x 2 root root 4096 May 12 07:30 gettext
drwxr-xr-x 3 root root 20480 May 16 03:04 git-core
drwxr-xr-x 2 root root 4096 May 16 03:03 gnupg
drwxr-xr-x 2 root root 4096 May 16 03:03 gnupg2
drwxr-xr-x 2 root root 4096 May 16 03:04 gold-ld
drwxr-xr-x 4 root root 4096 May 12 07:30 groff
drwxr-xr-x 4 root root 4096 Apr 27 2018 initramfs-tools
drwxr-xr-x 3 root root 4096 Apr 27 2018 kernel
drwxr-xr-x 3 root root 4096 Apr 27 2018 klibc
drwxr-xr-x 3 root root 4096 May 15 15:11 linux
drwxr-xr-x 3 root root 4096 Jul 21 2018 linux-image-4.4.132-1072-rockch
ip-ayufan-ga1d27dba5a2e
drwxr-xr-x 3 root root 4096 Jul 21 2018 locale
drwxr-xr-x 3 root root 4096 May 16 03:08 lsb
drwxr-xr-x 2 root root 4096 May 12 07:30 man-db
drwxr-xr-x 3 root root 4096 Apr 27 2018 mime
drwxr-xr-x 2 root root 4096 Apr 20 2018 modules-load.d
drwxr-xr-x 6 root root 4096 Apr 27 2018 networkd-dispatcher
drwxr-xr-x 3 root root 4096 Mar 3 19:52 nginx
drwxr-xr-x 56 root root 4096 May 12 09:46 nodejs
drwxr-xr-x 2 root root 4096 Jul 21 2018 ntp
drwxr-xr-x 2 root root 4096 May 16 03:04 openssh
-rw-r--r-- 1 root root 386 Feb 5 07:32 os-release
drwxr-xr-x 3 root root 4096 Apr 27 2018 pm-utils
drwxr-xr-x 2 root root 4096 May 16 03:03 policykit-1
drwxr-xr-x 3 root root 4096 Jul 21 2018 pppd
drwxr-xr-x 27 root root 24576 May 12 07:30 python2.7
drwxr-xr-x 3 root root 4096 Apr 27 2018 python3
drwxr-xr-x 29 root root 20480 May 16 03:03 python3.6
drwxr-xr-x 3 root root 4096 Jul 21 2018 python3.7
drwxr-xr-x 5 root root 4096 May 12 07:30 rpm
drwxr-xr-x 2 root root 4096 Apr 27 2018 rsyslog
drwxr-xr-x 2 root root 4096 Feb 5 2018 sasl2
lrwxrwxrwx 1 root root 16 Dec 5 2017 sendmail -> ../sbin/sendmail
lrwxrwxrwx 1 root root 19 Mar 4 12:17 sftp-server -> openssh/sftp-ser
ver
drwxr-xr-x 2 root root 4096 May 15 14:59 snapd
drwxr-xr-x 2 root root 4096 Jan 30 09:53 software-properties
drwxr-xr-x 3 root root 4096 May 12 07:29 ssl
drwxr-xr-x 2 root root 4096 Apr 27 2018 sudo
drwxr-xr-x 2 root root 4096 May 16 03:02 sysctl.d
drwxr-xr-x 2 root root 4096 Jul 21 2018 sysstat
drwxr-xr-x 10 root root 4096 May 15 14:59 systemd
drwxr-xr-x 2 root root 4096 Apr 27 2018 sysusers.d
drwxr-xr-x 2 root root 4096 Jul 21 2017 tar
drwxr-xr-x 2 root root 4096 Apr 27 2018 tc
drwxr-xr-x 2 root root 4096 May 16 03:03 tmpfiles.d
drwxr-xr-x 2 root root 4096 Jul 21 2018 u-boot-rock64
drwxr-xr-x 2 root root 4096 May 16 03:03 valgrind

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