A. cron is a time-based scheduling service in Linux / Unix-like computer operating systems.
Login to UNIX system
Type the following command to enter cronjob:
$ crontab -eEach cronjob has following syntax:
# +---------------- minute (0 - 59) # | +------------- hour (0 - 23) # | | +---------- day of month (1 - 31) # | | | +------- month (1 - 12) # | | | | +---- day of week (0 - 6) (Sunday=0 or 7) # | | | | | * * * * * command to be executedTo get crontab to run a task every 10 minutes you could type as follow
*/10 * * * * /path/to/commandSave and close the file.
The message that kept popping up was:
System file checker will verify all system files and will replace any file that is corrupt, modified or damaged.
What about the time? Pretty easy too. Just type in the word time and you can change the time too:
Note that the time is in 24-hour format and you can specify it down
all the way to milliseconds. You should be able to change the time
without having to open an elevated command prompt. If you get an error,
however, then try running the command prompt as Administrator.
Note that if you are in a domain, you may simply be restricted by the
group policy set by your company. If you’re not on a domain and
Administrators don’t have the two privileges shown above, then adding
the group to the security setting should fix the problem.
The password fields should automatically be filled in, so there is no
need to type in any passwords. Go head and restart the computer and see
what happens.
Each of the following Windows 8 recover methods performs a specific type of operating system reset:
Scroll down to the General listing and click the Get started button listed under Refresh your PC without affecting your files.
You can also check out my previous post on 
Scroll down to the General listing and select it. From the right-side submenu, locate the Remove everything and reinstall Windows option and click the Get started button.
From the Recovery window, select the Open System Restore option.
This will launch the System Restore panel, where you can select a System Restore point to revert Windows to.
Those are the three main ways to recover the operating system in
Windows 8. Thank you for stopping by the site for today’s post. Enjoy!
And sure enough, I got one of these error message on my Windows 7 PC
last week. The problem with these errors and the reason why they are so
popular is because they have all sort of causes. It’s not just one issue
that causes the error, otherwise it would be easy to fix. In this
article, I’ll try to go through all the different methods you can use to
fix the error.
You want to run the program and then sort all the items by
Manufacturer. Anything that is not from Microsoft should be disabled.
Again, if the issue goes away, then you know it’s one of those shell
extensions and you can enable them one by one. To disable, just select
the item and then click on the red circle button.
On the View tab, check the box that says Always show icons, never thumbnails.
What does this do? Well, basically instead of trying to show a small
thumbnail preview of a picture or video, it will just show an icon. That
may not be ideal, but if it gets rid of the problem of explorer not
responding, then it might be worth it.
At the command prompt, simply type in the following command:
This will check all system and protected files and replace them if
any of them are found to be corrupted. If this does not work, you can
try a repair install.
You can get to startup repair from the System Recovery Options
dialog shown above when the computer first loads. Basically, you need
to press and hold F8 while your computer is booting. Then you’ll get the
list of Advanced Boot Options, where you will choose Repair your computer.
Click Startup Repair and let it do it’s thing. Also, while you are in
the System Recovery Options, you’ll see an option for Command Prompt.
From there, you can try running the following command: