Add A Cron Job Ubuntu Code Example


Example: set cron job in ubuntu

Setting Up a Website Backup through Cron :- =========================================== Step 1: Update your server. As a best practice, we will update and upgrade our server with the following command. 	apt-get update && apt-get upgrade  Step 2: Verify if the cron package is installed. 	dpkg -l cron      	a) Our example output let’s us know that the cron package is installed, along  	with its version:  ||/ Name Version Architecture Description +++-=========================-=================-=================-======================================================== ii cron 3.0pl1-128ubuntu2 amd64 process scheduling daemon  	b) Install cron package if necessary. 		sudo apt-get install cron  	c) Ensure that the cron service is running with the following command: 		systemctl status cron 		 Example Output: ---------------- * cron.service - Regular background program processing daemon Loaded: loaded (/lib/systemd/system/cron.service; enabled; vendor preset:enabled) Active: active (running) since Sat 2018-10-27 02:53:20 EDT; 5 days ago  Step 3: Configure the cron job. When you are logged in as your user, you are creating a cron job under that user. Creating a cron jobs owner is helpful when to know who is in charge of the cron as well as how to alter the cron  job in the future. 	crontab -e  Step 4: The system asks which editor you’d like to use; this tutorial is using option 2 (vim.basic).  tom@host2:~$ crontab -e no crontab for tom - using an empty one Select an editor. To change later, run 'select-editor'. 1. /bin/ed 2. /usr/bin/vim.basic 3. /usr/bin/vim.tiny Choose 1-3 []: 2  Step 5: In this file, you’ll see # signs followed by the direction on how to #use the file. Allow us a minute to explain the syntax needed to create a cron #task.  # Example of job definition: # .---------------- minute (0 - 59) # | .------------- hour (0 - 23) # | | .---------- day of month (1 - 31) # | | | .------- month (1 - 12) OR jan,feb,mar,apr ... # | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat # | | | | | # * * * * * user-name command to be executed

Comments

Post a Comment

Popular posts from this blog

Converting A String To Int In Groovy

Answer : Use the toInteger() method to convert a String to an Integer , e.g. int value = "99".toInteger() An alternative, which avoids using a deprecated method (see below) is int value = "66" as Integer If you need to check whether the String can be converted before performing the conversion, use String number = "66" if (number.isInteger()) { int value = number as Integer } Deprecation Update In recent versions of Groovy one of the toInteger() methods has been deprecated. The following is taken from org.codehaus.groovy.runtime.StringGroovyMethods in Groovy 2.4.4 /** * Parse a CharSequence into an Integer * * @param self a CharSequence * @return an Integer * @since 1.8.2 */ public static Integer toInteger(CharSequence self) { return Integer.valueOf(self.toString().trim()); } /** * @deprecated Use the CharSequence version * @see #toInteger(CharSequence) */ @Deprecated public static Integer toInteger(String self) { return toInteg
Read more

"Cannot Create Cache Directory /home//.composer/cache/repo/https---packagist.org/, Or Directory Is Not Writable. Proceeding Without Cache"

Answer : if anyone pass through here, this is shorter solution: sudo chown -R $USER $HOME/.composer it seems to me the group information is missing in your command sudo chown -R <user> /home/<user>/.composer/cache/repo/https---packagist.org Shoud be sudo chown -R <user>:<group> /home/<user>/.composer/cache/repo/https---packagist.org But to avoid other permission issues, I would rather advise: sudo chown -R <user>:<group> /home/<user>/.composer/cache (you'll need access to other folders in there) and sudo chown <user>:<group> /home/<user>/.composer To make sure your user has permissions enough on the global composer folder. Mind the missing recursion so the user don't own keys created by root. If you need to find out the group: groups <user>
Read more

Android How Can I Convert A String To A Editable

Answer : As you probably found out, Editable is an interface so you cannot call new Editable() . However an Editable is nothing more than a String with Spannables, so use SpannableStringBuilder: Editable editable = new SpannableStringBuilder("Pass a string here"); If you only want to change the Spannables, never the text itself, you can use a basic SpannableString. Use Editable.Factory.getInstance().newEditable(str) From the android documentation: Returns a new SpannedStringBuilder from the specified CharSequence. You can override this to provide a different kind of Spanned.
Read more