Compare file dates

Clash Royale CLAN TAG#URR8PPP

up vote
1
down vote

favorite

Sometimes when I boot, my system goes into emergency mode.

I then use Clonezilla to restore an image.

Usually the image is older than the current date.

This is part of a backup script that runs as a startup program.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

This then overwrites my zip file with one that is in fact older.

I thought that if I could compare the file dates, before the zip operation, I could prevent the overwriting.

I tried this.

file1time=`stat -c %Y /home/andy/bin/Ubuntu_Scripts.zip`

file2time=`stat -c %Y /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/Ubuntu_Scripts.zip`

if [ "$file1time" -ot "$file2time" ]
then
 echo "File is older. "
fi 

18.04 files mate copy

share|improve this question

asked Aug 9 at 13:04

fixit7

491317

add a comment | 

up vote
1
down vote

favorite

Sometimes when I boot, my system goes into emergency mode.

I then use Clonezilla to restore an image.

Usually the image is older than the current date.

This is part of a backup script that runs as a startup program.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

This then overwrites my zip file with one that is in fact older.

I thought that if I could compare the file dates, before the zip operation, I could prevent the overwriting.

I tried this.

file1time=`stat -c %Y /home/andy/bin/Ubuntu_Scripts.zip`

file2time=`stat -c %Y /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/Ubuntu_Scripts.zip`

if [ "$file1time" -ot "$file2time" ]
then
 echo "File is older. "
fi 

18.04 files mate copy

share|improve this question

asked Aug 9 at 13:04

fixit7

491317

add a comment | 

up vote
1
down vote

favorite

up vote
1
down vote

favorite

Sometimes when I boot, my system goes into emergency mode.

I then use Clonezilla to restore an image.

Usually the image is older than the current date.

This is part of a backup script that runs as a startup program.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

This then overwrites my zip file with one that is in fact older.

I thought that if I could compare the file dates, before the zip operation, I could prevent the overwriting.

I tried this.

file1time=`stat -c %Y /home/andy/bin/Ubuntu_Scripts.zip`

file2time=`stat -c %Y /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/Ubuntu_Scripts.zip`

if [ "$file1time" -ot "$file2time" ]
then
 echo "File is older. "
fi 

18.04 files mate copy

share|improve this question

asked Aug 9 at 13:04

fixit7

491317

Sometimes when I boot, my system goes into emergency mode.

I then use Clonezilla to restore an image.

Usually the image is older than the current date.

This is part of a backup script that runs as a startup program.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
cp -u Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

This then overwrites my zip file with one that is in fact older.

I thought that if I could compare the file dates, before the zip operation, I could prevent the overwriting.

I tried this.

file1time=`stat -c %Y /home/andy/bin/Ubuntu_Scripts.zip`

file2time=`stat -c %Y /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/Ubuntu_Scripts.zip`

if [ "$file1time" -ot "$file2time" ]
then
 echo "File is older. "
fi 

18.04 files mate copy

share|improve this question

asked Aug 9 at 13:04

fixit7

491317

share|improve this question

share|improve this question

asked Aug 9 at 13:04

fixit7

491317

asked Aug 9 at 13:04

fixit7

491317

asked Aug 9 at 13:04

fixit7

491317

491317

add a comment | 

add a comment | 

2 Answers
2

active

oldest

votes

up vote
3
down vote



accepted

Use rsync instead of cp and you can use the --update flag that will only update when you are copying a newer file.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

share|improve this answer

answered Aug 9 at 13:18

Katu

2,2051326

add a comment | 

up vote
2
down vote

Your code uses -ot where it should use -lt. See the example below.

#!/bin/bash

file1time=`stat -c %Y /home/niclas/dbat/INSTALL.txt`

file2time=`stat -c %Y /home/niclas/dbat/README.txt`

if [ "$file1time" -lt "$file2time" ]
then
 echo "INSTALL.txt is older."
else
 echo "README.txt is older."
fi 

share|improve this answer

answered Aug 9 at 13:26

Niclas Börlin

7961515

add a comment | 

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "89"
;
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',
convertImagesToLinks: true,
noModals: false,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

 

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

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1063832%2fcompare-file-dates%23new-answer', 'question_page');

);

Post as a guest

Name Email

2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
3
down vote



accepted

Use rsync instead of cp and you can use the --update flag that will only update when you are copying a newer file.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

share|improve this answer

answered Aug 9 at 13:18

Katu

2,2051326

add a comment | 

up vote
3
down vote



accepted

Use rsync instead of cp and you can use the --update flag that will only update when you are copying a newer file.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

share|improve this answer

answered Aug 9 at 13:18

Katu

2,2051326

add a comment | 

up vote
3
down vote



accepted

up vote
3
down vote



accepted

Use rsync instead of cp and you can use the --update flag that will only update when you are copying a newer file.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

share|improve this answer

answered Aug 9 at 13:18

Katu

2,2051326

Use rsync instead of cp and you can use the --update flag that will only update when you are copying a newer file.

cd /home/andy/bin/
zip -u -q Ubuntu_Scripts.zip *.sh *.rb *.c *.py *.txt
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB1/Ubuntu_Mate_18.04/
rsync -av --update Ubuntu_Scripts.zip /media/andy/MAXTOR_SDB5/Emergency_Backup/

share|improve this answer

answered Aug 9 at 13:18

Katu

2,2051326

share|improve this answer

share|improve this answer

answered Aug 9 at 13:18

Katu

2,2051326

answered Aug 9 at 13:18

Katu

2,2051326

answered Aug 9 at 13:18

Katu

2,2051326

2,2051326

add a comment | 

add a comment | 

up vote
2
down vote

Your code uses -ot where it should use -lt. See the example below.

#!/bin/bash

file1time=`stat -c %Y /home/niclas/dbat/INSTALL.txt`

file2time=`stat -c %Y /home/niclas/dbat/README.txt`

if [ "$file1time" -lt "$file2time" ]
then
 echo "INSTALL.txt is older."
else
 echo "README.txt is older."
fi 

share|improve this answer

answered Aug 9 at 13:26

Niclas Börlin

7961515

add a comment | 

up vote
2
down vote

Your code uses -ot where it should use -lt. See the example below.

#!/bin/bash

file1time=`stat -c %Y /home/niclas/dbat/INSTALL.txt`

file2time=`stat -c %Y /home/niclas/dbat/README.txt`

if [ "$file1time" -lt "$file2time" ]
then
 echo "INSTALL.txt is older."
else
 echo "README.txt is older."
fi 

share|improve this answer

answered Aug 9 at 13:26

Niclas Börlin

7961515

add a comment | 

up vote
2
down vote

up vote
2
down vote

Your code uses -ot where it should use -lt. See the example below.

#!/bin/bash

file1time=`stat -c %Y /home/niclas/dbat/INSTALL.txt`

file2time=`stat -c %Y /home/niclas/dbat/README.txt`

if [ "$file1time" -lt "$file2time" ]
then
 echo "INSTALL.txt is older."
else
 echo "README.txt is older."
fi 

share|improve this answer

answered Aug 9 at 13:26

Niclas Börlin

7961515

Your code uses -ot where it should use -lt. See the example below.

#!/bin/bash

file1time=`stat -c %Y /home/niclas/dbat/INSTALL.txt`

file2time=`stat -c %Y /home/niclas/dbat/README.txt`

if [ "$file1time" -lt "$file2time" ]
then
 echo "INSTALL.txt is older."
else
 echo "README.txt is older."
fi 

share|improve this answer

answered Aug 9 at 13:26

Niclas Börlin

7961515

share|improve this answer

share|improve this answer

answered Aug 9 at 13:26

Niclas Börlin

7961515

answered Aug 9 at 13:26

Niclas Börlin

7961515

answered Aug 9 at 13:26

Niclas Börlin

7961515

7961515

add a comment | 

add a comment | 

 

draft saved

draft discarded

 

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

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1063832%2fcompare-file-dates%23new-answer', 'question_page');

);

Post as a guest

Name Email

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

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

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

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name Email

Name Email

Name

Email

Name Email

Name

Email