Fedora 25
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Management Tools
2016/12/08
 
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 fedora25 /root 

total 28
dr-xr-x---.  2 root root  135 Dec  9 01:16 .
dr-xr-xr-x. 17 root root  236 Dec  9 01:16 ..
-rw-------.  1 root root   16 Dec  9 01:16 .bash_history
-rw-r--r--.  1 root root   18 Feb  5  2016 .bash_logout
-rw-r--r--.  1 root root  176 Feb  5  2016 .bash_profile
-rw-r--r--.  1 root root  176 Feb  5  2016 .bashrc
...
[3] "cat" a file in a virtual machine.
[root@dlp ~]#
virt-cat -d fedora25 /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
...
[4] Edit a file in a virtual machine.
[root@dlp ~]#
virt-edit -d fedora25 /etc/fstab 


#
# /etc/fstab
# Created by anaconda on Fri Dec  9 01:01:14 2016
#
# 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=f53c9898-86cc-4be3-a657-40b07e847274 /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 fedora25 

Filesystem                           1K-blocks       Used  Available  Use%
fedora25:/dev/sda1                      999320     104852     825656   11%
fedora25:/dev/fedora/root              8374272     981216    7393056   12%
[6] Mount a disk for a virtual machine.
[root@dlp ~]#
guestmount -d fedora25 -i /media

[root@dlp ~]#
ll /media 

total 20
lrwxrwxrwx.  1 root root    7 Feb  4  2016 bin -> usr/bin
dr-xr-xr-x.  4 root root 4096 Dec  9 10:10 boot
drwxr-xr-x.  2 root root    6 Dec  9 10:01 dev
drwxr-xr-x. 90 root root 8192 Dec  9 10:15 etc
drwxr-xr-x.  3 root root   20 Dec  9 10:13 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
    -                                           (Windows10)
    -                                           (fedora25)
    -                                           (template)
 
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