Fedora 27
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Management Tools
2017/12/21
 
Install useful tools for virtual machine management.
[1] Install required packages.
[root@dlp ~]#
dnf -y install libguestfs-tools virt-top
[2] [ls] a directory in a virtual machine.
[root@dlp ~]#
virt-ls -l -d fedora27 /root 

total 28
dr-xr-x---.  2 root root  135 Dec 21 02:57 .
dr-xr-xr-x. 17 root root  224 Dec 21 02:43 ..
-rw-------.  1 root root   16 Dec 21 02:57 .bash_history
-rw-r--r--.  1 root root   18 Jul 28 22:22 .bash_logout
-rw-r--r--.  1 root root  176 Jul 28 22:22 .bash_profile
-rw-r--r--.  1 root root  176 Jul 28 22:22 .bashrc
...
[3] [cat] a file in a virtual machine.
[root@dlp ~]#
virt-cat -d fedora27 /etc/passwd 

root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
...
[4] Edit a file in a virtual machine.
[root@dlp ~]#
virt-edit -d fedora27 /etc/fstab 


#
# /etc/fstab
# Created by anaconda on Thu Dec 21 02:42:14 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/fedora-root /                       xfs     defaults        0 0
UUID=3efa9577-8c2c-45d3-8718-4ab4651392db /boot ext4    defaults        1 2
/dev/mapper/fedora-swap swap                    swap    defaults        0 0
[5] Display disk usage in a virtual machine.
[root@dlp ~]#
virt-df -d fedora27 

Filesystem                           1K-blocks       Used  Available  Use%
fedora27:/dev/sda1                      999320     118992     811516   12%
fedora27:/dev/fedora/root             15718400    1205444   14512956    8%
[6] Mount a disk for a virtual machine.
[root@dlp ~]#
guestmount -d fedora27 -i /media

[root@dlp ~]#
ll /media 

total 20
lrwxrwxrwx.  1 root root    7 Aug  3 08:32 bin -> usr/bin
dr-xr-xr-x.  6 root root 4096 Dec 21 11:49 boot
drwxr-xr-x.  2 root root    6 Dec 21 11:42 dev
drwxr-xr-x. 93 root root 8192 Dec 21 11:57 etc
drwxr-xr-x.  3 root root   20 Dec 21 11:51 home
...
[7] Display the status of virtual machines.
[root@dlp ~]#
virt-top 

virt-top 10:24:32 - x86_64 6/6CPU 2593MHz 7983MB
2 domains, 1 active, 1 running, 0 sleeping, 0 paused, 1 inactive D:0 O:0 X:0
CPU: 0.0%  Mem: 500 MB (500 MB by guests)

   ID S RDRQ WRRQ RXBY TXBY %CPU %MEM    TIME   NAME
    -                                           (Win2k16)
    -                                           (fedora27)
 
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