what is the real way to verify open files
what we do is that
lsof | sort | uniq >/tmp/file
so /tmp/file include all open files
and the number of open files can be identified by
wc -l /tmp/file
3259806 /tmp/file
until now cool
but when we are looking at that file we saw
more /tmp/file
abrt-dbus 189428 root 1u unix 0xffff883fcd70c380 0t0 61987 socket
abrt-dbus 189428 root 2u unix 0xffff883fcd70c380 0t0 61987 socket
abrt-dbus 189428 root 3u a_inode 0,9 0 7411 [eventfd]
abrt-dbus 189428 root 4u unix 0xffff883da772cb00 0t0 3903424237 socket
abrt-dbus 189428 root 5u a_inode 0,9 0 7411 [eventfd]
abrt-dbus 189428 root mem REG 253,0 110808 201609749 /usr/lib64/libresolv-2.17.so
abrt-dbus 189428 root mem REG 253,0 1141560 201609729 /usr/lib64/libm-2.17.so
abrt-dbus 189428 root mem REG 253,0 118672 202713390 /usr/lib64/libpolkit-gobject-1.so.0.0.0
abrt-dbus 189428 root mem REG 253,0 1257792 203905333 /usr/lib64/libnss3.so
abrt-dbus 189428 root mem REG 253,0 1287904 201610325 /usr/lib64/libglib-2.0.so.0.4200.2
abrt-dbus 189428 root mem REG 253,0 142304 201609747 /usr/lib64/libpthread-2.17.so
abrt-dbus 189428 root mem REG 253,0 147096 201609950 /usr/lib64/libselinux.so.1
so do the following lines also need to be considered as open files? or not?
abrt-dbus 189428 root 1u unix 0xffff883fcd70c380 0t0 61987 socket
abrt-dbus 189428 root 2u unix 0xffff883fcd70c380 0t0 61987 socket
abrt-dbus 189428 root 3u a_inode 0,9 0 7411 [eventfd]
abrt-dbus 189428 root 4u unix 0xffff883da772cb00 0t0 3903424237 socket
abrt-dbus 189428 root 5u a_inode 0,9 0 7411
or
we need to count only the lines that ended with files as
abrt-dbus 189428 root mem REG 253,0 110808 201609749 /usr/lib64/libresolv-2.17.so
abrt-dbus 189428 root mem REG 253,0 1141560 201609729 /usr/lib64/libm-2.17.so
abrt-dbus 189428 root mem REG 253,0 118672 202713390 /usr/lib64/libpolkit-gobject-1.so.0.0.0
abrt-dbus 189428 root mem REG 253,0 1257792 203905333 /usr/lib64/libnss3.so
abrt-dbus 189428 root mem REG 253,0 1287904 201610325 /usr/lib64/libglib-2.0.so.0.4200.2
abrt-dbus 189428 root mem REG 253,0 142304 201609747 /usr/lib64/libpthread-2.17.so
abrt-dbus 189428 root mem REG 253,0 147096 201609950 /usr/lib64/libselinux.so.1
