Time Sync Problem Between VirtualBox And Host System

In my machine I have dual operating systems (windows7 and sabayon). After installing the linux I found the time was not correct. I had to change the time zone to get it right.

Then when I got back to windows surprisingly I found that the time in windows have also changed. I changed the time in windows and then when I got back to linux the time has changed.

I just don't understand how to get of the problem. Is there really any way out there to sync the time in both the operating systems.

Hi Guys,

I have set up chrony with local clock, but when I issue chronyc tracking the leap status shows its not synchronised

[root@redhat_1 ~]# chronyc tracking
Reference ID : 127.127.1.1 ()
Stratum : 10
Ref time (UTC) : Sat Jan 10 00:29:47 2015
System time : 0.000000000 seconds fast of NTP time
Last offset : 0.000000000 seconds
RMS offset : 0.000000000 seconds
Frequency : 0.000 ppm fast
Residual freq : 0.000 ppm
Skew : 0.000 ppm
Root delay : 0.000000 seconds
Root dispersion : 0.000001 seconds
Update interval : 0.0 seconds
Leap status : Not synchronised

I edited the chrony.conf file and added " server localhost iburst" and uncommented the "local stratum 10 " to enable sync with local time source.

Let me know how to sync this with my local server time.

With regards,
Gopinath.

Hi Team,

I have RHEL satellite login credentials and I am able to update successfully my machine.Updating single worked for sometime.

My current requirement is to keep a separate VM locally in my environment and sync the RHEL repo to my machine.

How do I do it.

Thanks in advance

is it possible to set the time of the virtual machine according to the host system on which it is installed????
i tried to do it by enabling the "hardware clock in UTC time" in the Motherboard tab.. but it is giving me the time in UTC format.. but i want it in IST format.. can anyone help me in this.



Thanks in Advance

I have a degraded software RAID 1 array. md0 is in a state of clean, degraded while md1 is mounted in read-only and clean. I'm not sure how to go about fixing this. Any ideas?

cat /proc/mdstat
Code:

Personalities : [raid1] 
md1 : active (auto-read-only) raid1 sdb2[1] sda2[0]
      3909620 blocks super 1.2 [2/2] [UU]
      
md0 : active raid1 sda1[0]
      972849016 blocks super 1.2 [2/1] [U_]
      
unused devices: <none>

mdadm -D /dev/md0
Code:

/dev/md0:
        Version : 1.2
  Creation Time : Tue Jun 21 21:31:58 2011
     Raid Level : raid1
     Array Size : 972849016 (927.78 GiB 996.20 GB)
  Used Dev Size : 972849016 (927.78 GiB 996.20 GB)
   Raid Devices : 2
  Total Devices : 1
    Persistence : Superblock is persistent

    Update Time : Tue Jun  2 02:21:12 2015
          State : clean, degraded 
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0

           Name : 
           UUID : 
         Events : 3678064

    Number   Major   Minor   RaidDevice State
       0       8        1        0      active sync   /dev/sda1
       2       0        0        2      removed

mdadm -D /dev/md1
Code:

/dev/md1:
        Version : 1.2
  Creation Time : Tue Jun 21 21:32:09 2011
     Raid Level : raid1
     Array Size : 3909620 (3.73 GiB 4.00 GB)
  Used Dev Size : 3909620 (3.73 GiB 4.00 GB)
   Raid Devices : 2
  Total Devices : 2
    Persistence : Superblock is persistent

    Update Time : Sat May 16 15:17:56 2015
          State : clean 
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           Name : 
           UUID : 
         Events : 116

    Number   Major   Minor   RaidDevice State
       0       8        2        0      active sync   /dev/sda2
       1       8       18        1      active sync   /dev/sdb2

useradd -s /bin/bash -d /home/jaydul -m jaydul
[root@tuhin /]# cat /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
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
operator:x:11:0perator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin
nobody:x:99:99:Nobody:/:/sbin/nologin
dbus:x:81:81:System message bus:/:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
jaydul:x:1000:1000::/home/jaydul:/bin/bash
[root@tuhin /]# cat /etc/redhat-release
CentOS Linux release 7.0.1406 (Core)

jaydul:x:1000:1000::/home/jaydul:/bin/bash

Why 1000:1000: Group? it will be by default will be 500:500?
I was any mistake?
jaydul:x:500:500::/home/jaydul:/bin/bash

Every time I use the LAST command all users come to my screen, and if I try Date command, only the day, month and time come out. I'm just trying to list my last logins, where can I find a website that helps me with "how to see the day, month and time for a single user?

hi guys,

just a quick one on virtualbox...

could i have centos 7 running virtual box...then host another 3 vm's on it that are running live at the same time?
or is this best for vmware?

i would like centos 7
then another centos7 vm
debian vm
slackware vm (headless)

its a i5 with 8gb RAM...the vm's wont be doing much work,prob ssh into each to setup things and experiment
maybe run a couple of small wordpress web sites...nothing drastic...

any advice on the best way to get this result?

I have a hostlist and there are several hosts. I want to use ssh to connect to them. I want to see whether the host is available or not by the time length of ssh takes. If it take long than 5s (which means it is not available). Then stop it, and ssh to next host. Once a host is available, then output the name of host. I previously use nmap, but the IT security told it is not allowed to install it on the desktop on campus.
Code:

host_list="/home/campus27/zwang10/Desktop/cluster/program/hostlist"
HOSTS=`cat $host_list`
for line in $HOSTS
do 
timeout -5s `ssh $line`
done

The above script is all I can do.

Do it like this is your situation, your server, and the dir that are mentioned below, act like they are yours! im just looking for an accurate answer!
(student of O'Rielly School of Tech)


whenever you log in, your shell executes commands that it finds in your dotfiles, specifically .bash_login. In your .bash_login, add a series of commands that will first create a directory named ~/sysadmin1/my_peeps/$DATE, where $DATE is today's date in the format mmddyy. This command should succeed whether or not the directory ~/sysadmin1/my_peeps already exists. Then, it will redirect the output of the w command (which lists the currently logged in users on the system) to a file inside this newly created directory called users.$TIME, where $TIME is the current time in the format hhmmss (use 24 hour time).

In order to do this, you must use a new concept: assignment of a variable from the output of a command. For example, in order to set the variable EXAMPLEDATE using the unformatted output of the date command, you would do the following:

EXAMPLEDATE=`date`

The characters surrounding the date command are called "backticks." They are usually located on the same key as ~. They are not single quotation marks. This is actually another kind of expansion called "Command Substitution" (you can learn more in bash's manpage).

For this project, you can use the date command to get both the date and the current time, however, you will have to consult date's manpage to find out how to change the formatting.