sudo grub2-mkconfig -o /boot/grub2/grub.cfg

[user@localhost ~]$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
device-mapper: remove ioctl on osprober-linux-sda4  failed: Device or resource busy
Command failed.
Found Windows Recovery Environment on /dev/sda6
Found CentOS Linux 7 (Core) on /dev/mapper/centos-root
done

[user@localhost ~]$ lsblk
NAME                    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                       8:0    0 465.8G  0 disk
├─sda1                    8:1    0   260M  0 part
├─sda2                    8:2    0   128M  0 part
├─sda3                    8:3    0 155.5G  0 part
├─sda4                    8:4    0  44.5G  0 part
│ └─osprober-linux-sda4 253:6    0  44.5G  1 dm
├─sda5                    8:5    0   3.9G  0 part
├─sda6                    8:6    0    21G  0 part
├─sda7                    8:7    0   476M  0 part
├─sda8                    8:8    0   488M  0 part
├─sda9                    8:9    0  55.9G  0 part
│ ├─centos-swap         253:1    0   8.6G  0 lvm
│ └─centos-root         253:5    0  47.3G  0 lvm
├─sda10                   8:10   0     2M  0 part
├─sda11                   8:11   0   476M  0 part /boot
└─sda12                   8:12   0  74.5G  0 part
  ├─fedora-root         253:0    0  18.6G  0 lvm  /
  ├─fedora-swap         253:2    0   3.7G  0 lvm  [SWAP]
  ├─fedora-home         253:3    0  46.6G  0 lvm  /home
  └─fedora-tmp          253:4    0   4.7G  0 lvm  /tmp

[ag@localhost ~]$ blkid
/dev/sda1: UUID="DA93-5078" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="78e51172-9ad5-469a-b729-1caea06b8a78"
/dev/sda3: LABEL="Windows" UUID="44E40AB0E40AA470" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="f6fcfb0f-bd84-46ce-9ae3-64c11c1227ba"
/dev/sda4: LABEL="centos" UUID="4737def7-e202-d501-4003-d6f7e202d501" TYPE="ext4" PARTLABEL="Basic data partition" PARTUUID="000c3507-0340-f7d6-e25a-fd130e6a1800"
/dev/sda5: UUID="30775a08-8aa9-4ea1-af27-5ca9ef1875ad" TYPE="swap" PARTUUID="14fba559-31ab-4f78-a984-efb215a7924a"
/dev/sda6: LABEL="RECOVERY" UUID="E6365B50365B213B" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="b8a66b35-354f-459c-8e27-37b1c785537b"
/dev/sda7: SEC_TYPE="msdos" UUID="C7BA-22FF" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="6d81ab7e-3430-4386-8dac-ef0a2fc6710e"
/dev/sda8: UUID="d173fc15-159b-46ce-a6b8-7eec5ae16212" TYPE="ext4" PARTUUID="0744e391-98f1-48cc-981c-ea3e947156fb"
/dev/sda9: UUID="ZccN7Y-b2tr-ouWL-kAvM-uR2c-jvCM-MOWIiq" TYPE="LVM2_member" PARTUUID="c577ae03-ee01-46a4-a0cd-9f76fcb42ec6"
/dev/sda11: UUID="80012451-82e0-4a65-b272-04c9a994da22" TYPE="ext4" PARTUUID="8b917a76-ef19-4b88-87a2-59a82cf2faf7"
/dev/sda12: UUID="pfj5zF-4QfP-7Cf7-kQV4-Qe5o-ffnC-HfBcaf" TYPE="LVM2_member" PARTUUID="38f3c931-a3f0-411a-85dd-1510b9cca81c"
/dev/mapper/fedora-root: UUID="d32ff20b-8a39-46d5-8dc8-4e436acbcb0d" TYPE="ext4"
/dev/mapper/centos-swap: UUID="712b5736-59e8-4bd1-b1c5-018b2db5dbd0" TYPE="swap"
/dev/mapper/fedora-swap: UUID="fae6a81b-7746-479e-940c-6061e9864ed8" TYPE="swap"
/dev/mapper/fedora-home: UUID="d5c9379b-26c6-417e-9d50-e0c2d84234d6" TYPE="ext4"
/dev/mapper/fedora-tmp: UUID="46ca4005-0748-4edb-b7b3-6ec9d85438ec" TYPE="ext4"
/dev/mapper/centos-root: UUID="f7110177-3db4-4c68-86ea-9d3e4737b3c8" TYPE="xfs"
/dev/mapper/osprober-linux-sda4: LABEL="centos" UUID="4737def7-e202-d501-4003-d6f7e202d501" TYPE="ext4"