Ygtjki

Arduino Pro Micro - switch off LEDs

In horse breeding, what is the female equivalent of putting a horse out "to stud"?

How do I add random spotting to the same face in cycles?

Typeface like Times New Roman but with "tied" percent sign

"... to apply for a visa" or "... and applied for a visa"?

Problems with Ubuntu mount /tmp

What is special about square numbers here?

Was credit for the black hole image misattributed?

Why can't wing-mounted spoilers be used to steepen approaches?

Difference between "generating set" and free product?

Didn't get enough time to take a Coding Test - what to do now?

Derivation tree not rendering

Is it ethical to upload a automatically generated paper to a non peer-reviewed site as part of a larger research?

Wall plug outlet change

Sort a list of pairs representing an acyclic, partial automorphism

Single author papers against my advisor's will?

Working through the single responsibility principle (SRP) in Python when calls are expensive

How does ice melt when immersed in water?

Change bounding box of math glyphs in LuaTeX

Can a 1st-level character have an ability score above 18?

How to politely respond to generic emails requesting a PhD/job in my lab? Without wasting too much time

He got a vote 80% that of Emmanuel Macron’s

Does Parliament need to approve the new Brexit delay to 31 October 2019?

how can a perfect fourth interval be considered either consonant or dissonant?

How to make secure backup in Ubuntu Linux

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

-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 Apr 10 at 3:21

G-Man

13.7k93870

asked Apr 10 at 0:35

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
  Apr 10 at 1:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  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
  Apr 10 at 1:17
  
  

  
  
  
  


• 
  
  
  

  
  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.
  Apr 10 at 5:10
  

  
  
  
  

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 Apr 10 at 3:21

G-Man

13.7k93870

asked Apr 10 at 0:35

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
  Apr 10 at 1:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  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
  Apr 10 at 1:17
  
  

  
  
  
  


• 
  
  
  

  
  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.
  Apr 10 at 5:10
  

  
  
  
  

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 Apr 10 at 3:21

G-Man

13.7k93870

asked Apr 10 at 0:35

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 Apr 10 at 3:21

G-Man

13.7k93870

asked Apr 10 at 0:35

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 Apr 10 at 3:21

G-Man

13.7k93870

asked Apr 10 at 0:35

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 Apr 10 at 3:21

G-Man

13.7k93870

edited Apr 10 at 3:21

G-Man

13.7k93870

asked Apr 10 at 0:35

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 Apr 10 at 0:35

user346408user346408

11

1 Answer
1

active

oldest

votes

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 Apr 10 at 3:48

answered Apr 10 at 1:22

FreddyFreddy

1,757210

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How is this an answer???
  
  – user5325
  2 days 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
  2 days ago
  
  

  
  
  
  

add a comment | 

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

user346408 is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f511568%2fhow-to-make-secure-backup-in-ubuntu-linux%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

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 Apr 10 at 3:48

answered Apr 10 at 1:22

FreddyFreddy

1,757210

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How is this an answer???
  
  – user5325
  2 days 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
  2 days 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 Apr 10 at 3:48

answered Apr 10 at 1:22

FreddyFreddy

1,757210

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  How is this an answer???
  
  – user5325
  2 days 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
  2 days 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 Apr 10 at 3:48

answered Apr 10 at 1:22

FreddyFreddy

1,757210

share|improve this answer

edited Apr 10 at 3:48

answered Apr 10 at 1:22

FreddyFreddy

1,757210

answered Apr 10 at 1:22

FreddyFreddy

1,757210

answered Apr 10 at 1:22

FreddyFreddy

1,757210