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How to make secure backup in Ubuntu Linux

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-1

I tried to understand the code but I have some difficulties in it.
crontab -e is crontab schedule formatpm 9pm at night every Sunday,
but it seem to me it is encrypted. 
Can any one explain it?

Crontab -e 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1

linux ubuntu cron

share|improve this question

edited yesterday

G-Man

13.7k93870

asked 2 days ago

user346408user346408

11

New contributor

user346408 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tried to understand the code but I have some difficulties .... this does not describe the difficulties in any way ........ what are you trying to accomplish?
  
  – jsotola
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  something like 2>&1 what does it mean and also /dev/null and also $USER i understand that the code wile make schedule -p pass0rd it is optional /var/backup/secure.zip here it it means we make new file called secure.zip
  
  – user346408
  2 days ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  What exactly is your question? How to make secure backup in Ubuntu Linux or to understand the command mentioned in your post? For the first one, there are lots of answers, for the second one, just type man crontab.
  
  – Mike V.D.C.
  yesterday
  

  
  
  
  

add a comment | 

-1

I tried to understand the code but I have some difficulties in it.
crontab -e is crontab schedule formatpm 9pm at night every Sunday,
but it seem to me it is encrypted. 
Can any one explain it?

Crontab -e 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1

linux ubuntu cron

share|improve this question

edited yesterday

G-Man

13.7k93870

asked 2 days ago

user346408user346408

11

New contributor

user346408 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tried to understand the code but I have some difficulties .... this does not describe the difficulties in any way ........ what are you trying to accomplish?
  
  – jsotola
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  something like 2>&1 what does it mean and also /dev/null and also $USER i understand that the code wile make schedule -p pass0rd it is optional /var/backup/secure.zip here it it means we make new file called secure.zip
  
  – user346408
  2 days ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  What exactly is your question? How to make secure backup in Ubuntu Linux or to understand the command mentioned in your post? For the first one, there are lots of answers, for the second one, just type man crontab.
  
  – Mike V.D.C.
  yesterday
  

  
  
  
  

add a comment | 

I tried to understand the code but I have some difficulties in it.
crontab -e is crontab schedule formatpm 9pm at night every Sunday,
but it seem to me it is encrypted. 
Can any one explain it?

Crontab -e 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1

linux ubuntu cron

share|improve this question

edited yesterday

G-Man

13.7k93870

asked 2 days ago

user346408user346408

11

New contributor

user346408 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

Crontab -e 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1

share|improve this question

edited yesterday

G-Man

13.7k93870

asked 2 days ago

user346408user346408

11

New contributor

user346408 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited yesterday

G-Man

13.7k93870

asked 2 days ago

user346408user346408

11

New contributor

user346408 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited yesterday

G-Man

13.7k93870

edited yesterday

G-Man

13.7k93870

asked 2 days ago

user346408user346408

11

New contributor

user346408 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 2 days ago

user346408user346408

11

1 Answer
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The command crontab -e lets you edit your crontab and if you add the line 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1, save and exit your editor, then you have created a new entry that runs the command each Sunday at 9pm.

You can use crontab -l to display the content of your crontab on stdout without editing it.

The command creates a zip file /var/backup/secure.zip of the content of your home directory /home/$USER recursively (-r) and uses the password option -P passw0rd to encrypt it with password "passw0rd".

The >/dev/null 2>&1 at the end is used to prevent any output of the zip command to stdout and stderr to prevent cron from sending any mails (if successful or in the event of an error).

To unzip the zip file, you will have to enter the password if you use unzip secure.zip, or use unzip -P passw0rd secure.zip.

share|improve this answer

edited yesterday

answered 2 days ago

FreddyFreddy

1,612210

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How is this an answer???
  
  – user5325
  16 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @user5325 This is an answer explaining the crontab entry of the question and not "How to make a secure backup". In my opinion OP has chosen a bad title for the question. Is something wrong with the crontab explanation or why do I get the downvotes?
  
  – Freddy
  16 hours ago
  
  

  
  
  
  

add a comment | 

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0

The command crontab -e lets you edit your crontab and if you add the line 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1, save and exit your editor, then you have created a new entry that runs the command each Sunday at 9pm.

You can use crontab -l to display the content of your crontab on stdout without editing it.

The command creates a zip file /var/backup/secure.zip of the content of your home directory /home/$USER recursively (-r) and uses the password option -P passw0rd to encrypt it with password "passw0rd".

The >/dev/null 2>&1 at the end is used to prevent any output of the zip command to stdout and stderr to prevent cron from sending any mails (if successful or in the event of an error).

To unzip the zip file, you will have to enter the password if you use unzip secure.zip, or use unzip -P passw0rd secure.zip.

share|improve this answer

edited yesterday

answered 2 days ago

FreddyFreddy

1,612210

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How is this an answer???
  
  – user5325
  16 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @user5325 This is an answer explaining the crontab entry of the question and not "How to make a secure backup". In my opinion OP has chosen a bad title for the question. Is something wrong with the crontab explanation or why do I get the downvotes?
  
  – Freddy
  16 hours ago
  
  

  
  
  
  

add a comment | 

0

The command crontab -e lets you edit your crontab and if you add the line 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1, save and exit your editor, then you have created a new entry that runs the command each Sunday at 9pm.

You can use crontab -l to display the content of your crontab on stdout without editing it.

The command creates a zip file /var/backup/secure.zip of the content of your home directory /home/$USER recursively (-r) and uses the password option -P passw0rd to encrypt it with password "passw0rd".

The >/dev/null 2>&1 at the end is used to prevent any output of the zip command to stdout and stderr to prevent cron from sending any mails (if successful or in the event of an error).

To unzip the zip file, you will have to enter the password if you use unzip secure.zip, or use unzip -P passw0rd secure.zip.

share|improve this answer

edited yesterday

answered 2 days ago

FreddyFreddy

1,612210

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How is this an answer???
  
  – user5325
  16 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @user5325 This is an answer explaining the crontab entry of the question and not "How to make a secure backup". In my opinion OP has chosen a bad title for the question. Is something wrong with the crontab explanation or why do I get the downvotes?
  
  – Freddy
  16 hours ago
  
  

  
  
  
  

add a comment | 

The command crontab -e lets you edit your crontab and if you add the line 0 21 * * 0 zip -P passw0rd -r /var/backup/secure.zip /home/$USER >/dev/null 2>&1, save and exit your editor, then you have created a new entry that runs the command each Sunday at 9pm.

You can use crontab -l to display the content of your crontab on stdout without editing it.

The command creates a zip file /var/backup/secure.zip of the content of your home directory /home/$USER recursively (-r) and uses the password option -P passw0rd to encrypt it with password "passw0rd".

The >/dev/null 2>&1 at the end is used to prevent any output of the zip command to stdout and stderr to prevent cron from sending any mails (if successful or in the event of an error).

To unzip the zip file, you will have to enter the password if you use unzip secure.zip, or use unzip -P passw0rd secure.zip.

share|improve this answer

edited yesterday

answered 2 days ago

FreddyFreddy

1,612210

share|improve this answer

edited yesterday

answered 2 days ago

FreddyFreddy

1,612210

answered 2 days ago

FreddyFreddy

1,612210

answered 2 days ago

FreddyFreddy

1,612210