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A hit that allows the batter to make a complete circuit of the diamond and score a run. Backup power mode, called Backup-Only in the Tesla app, reserves 100% of your Powerwall energy to provide seamless power to your home in the event of an outage.Powerwall will charge from the grid (if you don’t have solar) or from your solar system and only discharge during a grid outage.ow do I add cron job under Linux or UNIX like operating system?
Cron job are used to schedule commands to be executed periodically. You can setup commands or scripts, which will repeatedly run at a set time. Cron is one of the most useful tool in Linux or UNIX like operating systems. The cron service (daemon) runs in the background and constantly checks the /etc/crontab file, and /etc/cron.*/ directories. It also checks the /var/spool/cron/ directory.
|Estimated completion time||20m|
Types of cron configuration files
- The UNIX / Linux system crontab : Usually, used by system services and critical jobs that requires root like privileges. The sixth field (see below for field description) is the name of a user for the command to run as. This gives the system crontab the ability to run commands as any user.
- The user crontabs: User can install their own cron jobs using the crontab command. The sixth field is the command to run, and all commands run as the user who created the crontab
How Do I install or create or edit my own cron jobs?
$ crontab -e
Syntax of crontab (field description)
- 1: Minute (0-59)
- 2: Hours (0-23)
- 3: Day (0-31)
- 4: Month (0-12 [12 December])
- 5: Day of the week(0-7 [7 or 0 sunday])
- /path/to/command - Script or command name to schedule
Example: Run backup cron job script
# crontab -e
Append the following entry:
0 3 * * * /root/backup.sh
Save and close the file.
5 0 * * * /path/to/command
Run /path/to/script.sh at 2:15pm on the first of every month, enter:
15 14 1 * * /path/to/script.sh
Run /scripts/phpscript.php at 10 pm on weekdays, enter:
0 22 * * 1-5 /scripts/phpscript.php
Run /root/scripts/perl/perlscript.pl at 23 minutes after midnight, 2am, 4am .., everyday, enter:
23 0-23/2 * * * /root/scripts/perl/perlscript.pl
Run /path/to/unixcommand at 5 after 4 every Sunday, enter:
5 4 * * sun /path/to/unixcommand
How do I use operators?
- The asterisk (*) : This operator specifies all possible values for a field. For example, an asterisk in the hour time field would be equivalent to every hour or an asterisk in the month field would be equivalent to every month.
- The comma (,) : This operator specifies a list of values, for example: '1,5,10,15,20, 25'.
- The dash (-) : This operator specifies a range of values, for example: '5-15' days , which is equivalent to typing '5,6,7,8,9,..,13,14,15' using the comma operator.
- The separator (/) : This operator specifies a step value, for example: '0-23/' can be used in the hours field to specify command execution every other hour. Steps are also permitted after an asterisk, so if you want to say every two hours, just use */2.
How do I disable email output?
0 3 * * * /root/backup.sh >/dev/null 2>&1
To mail output to particular email account let us say [email protected] you need to define MAILTO variable as follows:
0 3 * * * /root/backup.sh >/dev/null 2>&1
See 'Disable The Mail Alert By Crontab Command' for more information.
Task: List all your cron jobs
# crontab -l
# crontab -u username -l
To remove or erase all crontab jobs use the following command:
# Delete the current cron jobs #
## Delete job for specific user. Must be run as root user ##
crontab -r -u username
Use special string to save time
|@reboot||Run once, at startup.|
|@yearly||Run once a year, '0 0 1 1 *'.|
|@annually||(same as @yearly)|
|@monthly||Run once a month, '0 0 1 * *'.|
|@weekly||Run once a week, '0 0 * * 0'.|
|@daily||Run once a day, '0 0 * * *'.|
|@midnight||(same as @daily)|
|@hourly||Run once an hour, '0 * * * *'.|
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More about /etc/crontab file and /etc/cron.d/* directories
Understanding Default /etc/crontab
|/etc/cron.d/||Put all scripts here and call them from /etc/crontab file.|
|/etc/cron.daily/||Run all scripts once a day|
|/etc/cron.hourly/||Run all scripts once an hour|
|/etc/cron.monthly/||Run all scripts once a month|
|/etc/cron.weekly/||Run all scripts once a week|
How do I use above directories to put my own scripts or jobs?
# chmod +x /etc/cron.daily/clean.cache
How do I backup installed cron jobs entries?
# crontab -l > /nas01/backup/cron/users.root.bakup
# crontab -u userName -l > /nas01/backup/cron/users.userName.bakup
Now that you signed up for a Comodo Cloud (CCloud) account, the next step is to back up your files online. The easy and quick way is to use Comodo Backup. Follow the steps below:
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- 1. If you've haven't done so already, download the Comodo BackUp setup file from http://download.comodo.com/cbu/download/setups/CB_setup.exe and install it in your computer. Your computer will restart on completion of installation.
- 2. Start the application by clicking Start > All Programs > Comodo > Comodo Backup > Comodo Backup. Comodo Backup first time run wizard will start to backup your important files.
- 3. Click 'Login' from the top-right corner and enter your username (your email address) and password as entered during Sign-Up.
- 4. Comodo Backup scans your system to discover and categorize the different types of files on your computer. Select the file type(s), so that all the files of relevant types stored in your computer (all the drive partitions of your hard disk drive) will be backed-up.
- My Pictures - All the pictures, image files, photographs, screen captures etc., stored in image file formats like .jpg. .png, .gif.
- My Documents - All the notepad files, text files, documents, spreadsheet files, presentation files etc., stored in document file formats like .txt, .rtf, .doc, .xls, .ppt, .odt, .ods, .odp, .wpd.
- My Music - All the sound, audio and music files stored in audio file formats like .mp3, .wma, .wav, .aac.
- My Videos - All the video files stored in file formats like .mp4, .wmv, .avi, .flv, .swf.
- 5. Click 'Online Backup'.
That's it! Your important files are now backed-up to your online storage space.
You can also schedule for backup of your important files and folders from different locations.
- 1. Start the application by clicking Start > All Programs > Comodo > Comodo Backup > Comodo Backup.
- 2. Click 'Backup Now' on the summary screen.
- 3. Select the files, folders and other important areas that you want to back up from the 'Backup Source' area and click 'Next'.
- 4. Select 'Online Storage' as the 'Backup Destination'
- 5. Enter your username (email address) and password then click 'Sign In' (remember to enable 'Sign In Automatically')
- 6. Click the alarm clock icon to configure a backup schedule.
- 7. Click 'Next' if you wish to configure advanced backup settings.
- 8. Click the 'Backup Now' button when you are ready to start copying your files to online storage.
That's it. Comodo Backup will begin copying your files over to your online storage immediately. Future backups will run according to the schedule you specified.
The powerful application Comodo Backup also allows you to backup your files and folders, Windows Registry, Email account settings, IM conversations and much more, with granular configuration. For more details on using Comodo Backup application, please refer to the online guide at http://help.comodo.com/topic-9-1-281-2732-Comodo-BackUp-Introduction.html.