Why my cron routine doesn't work
0
When I put
* * * * * /var/www/script.sh
Script is executed once per minute, but if I put
* */2 * * * /var/www/script.sh
instead, script doesn't execute at all
cron
edited Jan 21 at 15:08
steeldriver
67k11108180
asked Jan 21 at 15:04
kubawichkubawich
31
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
0
When I put
* * * * * /var/www/script.sh
Script is executed once per minute, but if I put
* */2 * * * /var/www/script.sh
instead, script doesn't execute at all
cron
edited Jan 21 at 15:08
steeldriver
67k11108180
asked Jan 21 at 15:04
kubawichkubawich
31
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
3
How long did you wait?* */2 * * *would mean every minute of every even hour (i.e. when the hour is divisible by 2) - it won't run at all if the hour is odd
– steeldriver
Jan 21 at 15:10
I want it to run once per hour. I was waiting one day now.
– kubawich
Jan 21 at 15:12
You could send the full output to a log file like this* */2 * * * /var/www/script.sh >> /path/to/file.log 2>&1. That way you can see if there's any permission issue, and/or a bash programing one.
– bistoco
Jan 21 at 15:13
2
For "once per hour", just change the first*to any valid minute (from 0-59) and leave the hour field as*
– steeldriver
Jan 21 at 15:15
add a comment |
0
0
0
When I put
* * * * * /var/www/script.sh
Script is executed once per minute, but if I put
* */2 * * * /var/www/script.sh
instead, script doesn't execute at all
cron
edited Jan 21 at 15:08
steeldriver
67k11108180
asked Jan 21 at 15:04
kubawichkubawich
31
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
When I put
* * * * * /var/www/script.sh
Script is executed once per minute, but if I put
* */2 * * * /var/www/script.sh
instead, script doesn't execute at all
cron
cron
edited Jan 21 at 15:08
steeldriver
67k11108180
asked Jan 21 at 15:04
kubawichkubawich
31
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Jan 21 at 15:08
steeldriver
67k11108180
asked Jan 21 at 15:04
kubawichkubawich
31
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Jan 21 at 15:08
steeldriver
67k11108180
edited Jan 21 at 15:08
steeldriver
67k11108180
edited Jan 21 at 15:08
steeldriver
67k11108180
67k11108180
asked Jan 21 at 15:04
kubawichkubawich
31
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Jan 21 at 15:04
kubawichkubawich
31
asked Jan 21 at 15:04
kubawichkubawich
31
31
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
kubawich is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
3
How long did you wait?* */2 * * *would mean every minute of every even hour (i.e. when the hour is divisible by 2) - it won't run at all if the hour is odd
– steeldriver
Jan 21 at 15:10
I want it to run once per hour. I was waiting one day now.
– kubawich
Jan 21 at 15:12
You could send the full output to a log file like this* */2 * * * /var/www/script.sh >> /path/to/file.log 2>&1. That way you can see if there's any permission issue, and/or a bash programing one.
– bistoco
Jan 21 at 15:13
2
For "once per hour", just change the first*to any valid minute (from 0-59) and leave the hour field as*
– steeldriver
Jan 21 at 15:15
add a comment |
3
How long did you wait?* */2 * * *would mean every minute of every even hour (i.e. when the hour is divisible by 2) - it won't run at all if the hour is odd
– steeldriver
Jan 21 at 15:10
I want it to run once per hour. I was waiting one day now.
– kubawich
Jan 21 at 15:12
You could send the full output to a log file like this* */2 * * * /var/www/script.sh >> /path/to/file.log 2>&1. That way you can see if there's any permission issue, and/or a bash programing one.
– bistoco
Jan 21 at 15:13
2
For "once per hour", just change the first*to any valid minute (from 0-59) and leave the hour field as*
– steeldriver
Jan 21 at 15:15
3
3
How long did you wait?
* */2 * * * would mean every minute of every even hour (i.e. when the hour is divisible by 2) - it won't run at all if the hour is odd– steeldriver
Jan 21 at 15:10
How long did you wait?
* */2 * * * would mean every minute of every even hour (i.e. when the hour is divisible by 2) - it won't run at all if the hour is odd– steeldriver
Jan 21 at 15:10
I want it to run once per hour. I was waiting one day now.
– kubawich
Jan 21 at 15:12
I want it to run once per hour. I was waiting one day now.
– kubawich
Jan 21 at 15:12
You could send the full output to a log file like this
* */2 * * * /var/www/script.sh >> /path/to/file.log 2>&1. That way you can see if there's any permission issue, and/or a bash programing one.– bistoco
Jan 21 at 15:13
You could send the full output to a log file like this
* */2 * * * /var/www/script.sh >> /path/to/file.log 2>&1. That way you can see if there's any permission issue, and/or a bash programing one.– bistoco
Jan 21 at 15:13
2
2
For "once per hour", just change the first
* to any valid minute (from 0-59) and leave the hour field as *– steeldriver
Jan 21 at 15:15
For "once per hour", just change the first
* to any valid minute (from 0-59) and leave the hour field as *– steeldriver
Jan 21 at 15:15
add a comment |
2 Answers
2
active
oldest
votes
0
You are supposed to change the '*' out for the number. Therefore your second asterix should be 2 so:
* 2 * * * /var/www/script.sh
and not
* */2 * * * /var/www/script.sh
For future reference
The first asterisk is for specifying the minute of the run (0-59)
The second asterisk is for specifying the hour of the run (0-23)
The third asterisk is for specifying the day of the month for the run (1-31)
The fourth asterisk is for specifying the month of the run (1-12)
The fifth asterisk is for specifying the day of the week (where Sunday is equal
answered Jan 21 at 15:07
Oskar LOskar L
1026
I guess it's correct if You want to run script at 2am everyday, but i want my script to run once per hour/two hours
– kubawich
Jan 21 at 15:11
Ok so you are correct with the syntax. and I am guessing you waited 2 hours to check right ? AS what you are doing is to run cron minute after every 2 hours. Is there nothing in syslog as for the execution of the script ?
– Oskar L
Jan 21 at 15:14
How can i check it?
– kubawich
Jan 21 at 15:20
Try this one: 1 */2 * * *
– Oskar L
Jan 21 at 15:22
2
I wonder why this is the accepted answer. The OP said "I want it to run once per hour." and* 2 * * *runs it every single minute from 2AM to 2:59AM. Completely different cases.
– PerlDuck
Jan 21 at 16:19
|
show 2 more comments
2
If you want it to run every hour, then you need a number in the minute field. To run it at quarter past the hour, for example, use:
15 * * * * /var/www/script.sh
From man -i 5 crontab:
Commands are executed by cron(8) when the minute, hour, and month of year fields match the current
time, and when at least one of the two day fields (day of month, or day of week) match the current
time (see ``Note'' below). cron(8) examines cron entries once every minute. The time and date
fields are:
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sun, or use names)
A field may be an asterisk (*), which always stands for ``first-last''.
Ranges of numbers are allowed. Ranges are two numbers separated with a hyphen. The specified
range is inclusive. For example, 8-11 for an ``hours'' entry specifies execution at hours 8, 9, 10
and 11.
Lists are allowed. A list is a set of numbers (or ranges) separated by commas. Examples:
``1,2,5,9'', ``0-4,8-12''.
Step values can be used in conjunction with ranges. Following a range with ``/<number>'' specifies
skips of the number's value through the range. For example, ``0-23/2'' can be used in the hours
field to specify command execution every other hour (the alternative in the V7 standard is
``0,2,4,6,8,10,12,14,16,18,20,22''). Steps are also permitted after an asterisk, so if you want to
say ``every two hours'', just use ``*/2''.
answered Jan 21 at 15:18
bitinerantbitinerant
1113
add a comment |
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2 Answers
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2 Answers
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0
You are supposed to change the '*' out for the number. Therefore your second asterix should be 2 so:
* 2 * * * /var/www/script.sh
and not
* */2 * * * /var/www/script.sh
For future reference
The first asterisk is for specifying the minute of the run (0-59)
The second asterisk is for specifying the hour of the run (0-23)
The third asterisk is for specifying the day of the month for the run (1-31)
The fourth asterisk is for specifying the month of the run (1-12)
The fifth asterisk is for specifying the day of the week (where Sunday is equal
answered Jan 21 at 15:07
Oskar LOskar L
1026
I guess it's correct if You want to run script at 2am everyday, but i want my script to run once per hour/two hours
– kubawich
Jan 21 at 15:11
Ok so you are correct with the syntax. and I am guessing you waited 2 hours to check right ? AS what you are doing is to run cron minute after every 2 hours. Is there nothing in syslog as for the execution of the script ?
– Oskar L
Jan 21 at 15:14
How can i check it?
– kubawich
Jan 21 at 15:20
Try this one: 1 */2 * * *
– Oskar L
Jan 21 at 15:22
2
I wonder why this is the accepted answer. The OP said "I want it to run once per hour." and* 2 * * *runs it every single minute from 2AM to 2:59AM. Completely different cases.
– PerlDuck
Jan 21 at 16:19
|
show 2 more comments
0
You are supposed to change the '*' out for the number. Therefore your second asterix should be 2 so:
* 2 * * * /var/www/script.sh
and not
* */2 * * * /var/www/script.sh
For future reference
The first asterisk is for specifying the minute of the run (0-59)
The second asterisk is for specifying the hour of the run (0-23)
The third asterisk is for specifying the day of the month for the run (1-31)
The fourth asterisk is for specifying the month of the run (1-12)
The fifth asterisk is for specifying the day of the week (where Sunday is equal
answered Jan 21 at 15:07
Oskar LOskar L
1026
I guess it's correct if You want to run script at 2am everyday, but i want my script to run once per hour/two hours
– kubawich
Jan 21 at 15:11
Ok so you are correct with the syntax. and I am guessing you waited 2 hours to check right ? AS what you are doing is to run cron minute after every 2 hours. Is there nothing in syslog as for the execution of the script ?
– Oskar L
Jan 21 at 15:14
How can i check it?
– kubawich
Jan 21 at 15:20
Try this one: 1 */2 * * *
– Oskar L
Jan 21 at 15:22
2
I wonder why this is the accepted answer. The OP said "I want it to run once per hour." and* 2 * * *runs it every single minute from 2AM to 2:59AM. Completely different cases.
– PerlDuck
Jan 21 at 16:19
|
show 2 more comments
0
0
0
You are supposed to change the '*' out for the number. Therefore your second asterix should be 2 so:
* 2 * * * /var/www/script.sh
and not
* */2 * * * /var/www/script.sh
For future reference
The first asterisk is for specifying the minute of the run (0-59)
The second asterisk is for specifying the hour of the run (0-23)
The third asterisk is for specifying the day of the month for the run (1-31)
The fourth asterisk is for specifying the month of the run (1-12)
The fifth asterisk is for specifying the day of the week (where Sunday is equal
answered Jan 21 at 15:07
Oskar LOskar L
1026
You are supposed to change the '*' out for the number. Therefore your second asterix should be 2 so:
* 2 * * * /var/www/script.sh
and not
* */2 * * * /var/www/script.sh
For future reference
The first asterisk is for specifying the minute of the run (0-59)
The second asterisk is for specifying the hour of the run (0-23)
The third asterisk is for specifying the day of the month for the run (1-31)
The fourth asterisk is for specifying the month of the run (1-12)
The fifth asterisk is for specifying the day of the week (where Sunday is equal
answered Jan 21 at 15:07
Oskar LOskar L
1026
edited Jan 21 at 15:17
answered Jan 21 at 15:07
Oskar LOskar L
1026
answered Jan 21 at 15:07
Oskar LOskar L
1026
answered Jan 21 at 15:07
Oskar LOskar L
1026
1026
I guess it's correct if You want to run script at 2am everyday, but i want my script to run once per hour/two hours
– kubawich
Jan 21 at 15:11
Ok so you are correct with the syntax. and I am guessing you waited 2 hours to check right ? AS what you are doing is to run cron minute after every 2 hours. Is there nothing in syslog as for the execution of the script ?
– Oskar L
Jan 21 at 15:14
How can i check it?
– kubawich
Jan 21 at 15:20
Try this one: 1 */2 * * *
– Oskar L
Jan 21 at 15:22
2
I wonder why this is the accepted answer. The OP said "I want it to run once per hour." and* 2 * * *runs it every single minute from 2AM to 2:59AM. Completely different cases.
– PerlDuck
Jan 21 at 16:19
|
show 2 more comments
I guess it's correct if You want to run script at 2am everyday, but i want my script to run once per hour/two hours
– kubawich
Jan 21 at 15:11
Ok so you are correct with the syntax. and I am guessing you waited 2 hours to check right ? AS what you are doing is to run cron minute after every 2 hours. Is there nothing in syslog as for the execution of the script ?
– Oskar L
Jan 21 at 15:14
How can i check it?
– kubawich
Jan 21 at 15:20
Try this one: 1 */2 * * *
– Oskar L
Jan 21 at 15:22
2
I wonder why this is the accepted answer. The OP said "I want it to run once per hour." and* 2 * * *runs it every single minute from 2AM to 2:59AM. Completely different cases.
– PerlDuck
Jan 21 at 16:19
I guess it's correct if You want to run script at 2am everyday, but i want my script to run once per hour/two hours
– kubawich
Jan 21 at 15:11
I guess it's correct if You want to run script at 2am everyday, but i want my script to run once per hour/two hours
– kubawich
Jan 21 at 15:11
Ok so you are correct with the syntax. and I am guessing you waited 2 hours to check right ? AS what you are doing is to run cron minute after every 2 hours. Is there nothing in syslog as for the execution of the script ?
– Oskar L
Jan 21 at 15:14
Ok so you are correct with the syntax. and I am guessing you waited 2 hours to check right ? AS what you are doing is to run cron minute after every 2 hours. Is there nothing in syslog as for the execution of the script ?
– Oskar L
Jan 21 at 15:14
How can i check it?
– kubawich
Jan 21 at 15:20
How can i check it?
– kubawich
Jan 21 at 15:20
Try this one: 1 */2 * * *
– Oskar L
Jan 21 at 15:22
Try this one: 1 */2 * * *
– Oskar L
Jan 21 at 15:22
2
2
I wonder why this is the accepted answer. The OP said "I want it to run once per hour." and
* 2 * * * runs it every single minute from 2AM to 2:59AM. Completely different cases.– PerlDuck
Jan 21 at 16:19
I wonder why this is the accepted answer. The OP said "I want it to run once per hour." and
* 2 * * * runs it every single minute from 2AM to 2:59AM. Completely different cases.– PerlDuck
Jan 21 at 16:19
|
show 2 more comments
2
If you want it to run every hour, then you need a number in the minute field. To run it at quarter past the hour, for example, use:
15 * * * * /var/www/script.sh
From man -i 5 crontab:
Commands are executed by cron(8) when the minute, hour, and month of year fields match the current
time, and when at least one of the two day fields (day of month, or day of week) match the current
time (see ``Note'' below). cron(8) examines cron entries once every minute. The time and date
fields are:
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sun, or use names)
A field may be an asterisk (*), which always stands for ``first-last''.
Ranges of numbers are allowed. Ranges are two numbers separated with a hyphen. The specified
range is inclusive. For example, 8-11 for an ``hours'' entry specifies execution at hours 8, 9, 10
and 11.
Lists are allowed. A list is a set of numbers (or ranges) separated by commas. Examples:
``1,2,5,9'', ``0-4,8-12''.
Step values can be used in conjunction with ranges. Following a range with ``/<number>'' specifies
skips of the number's value through the range. For example, ``0-23/2'' can be used in the hours
field to specify command execution every other hour (the alternative in the V7 standard is
``0,2,4,6,8,10,12,14,16,18,20,22''). Steps are also permitted after an asterisk, so if you want to
say ``every two hours'', just use ``*/2''.
answered Jan 21 at 15:18
bitinerantbitinerant
1113
add a comment |
2
If you want it to run every hour, then you need a number in the minute field. To run it at quarter past the hour, for example, use:
15 * * * * /var/www/script.sh
From man -i 5 crontab:
Commands are executed by cron(8) when the minute, hour, and month of year fields match the current
time, and when at least one of the two day fields (day of month, or day of week) match the current
time (see ``Note'' below). cron(8) examines cron entries once every minute. The time and date
fields are:
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sun, or use names)
A field may be an asterisk (*), which always stands for ``first-last''.
Ranges of numbers are allowed. Ranges are two numbers separated with a hyphen. The specified
range is inclusive. For example, 8-11 for an ``hours'' entry specifies execution at hours 8, 9, 10
and 11.
Lists are allowed. A list is a set of numbers (or ranges) separated by commas. Examples:
``1,2,5,9'', ``0-4,8-12''.
Step values can be used in conjunction with ranges. Following a range with ``/<number>'' specifies
skips of the number's value through the range. For example, ``0-23/2'' can be used in the hours
field to specify command execution every other hour (the alternative in the V7 standard is
``0,2,4,6,8,10,12,14,16,18,20,22''). Steps are also permitted after an asterisk, so if you want to
say ``every two hours'', just use ``*/2''.
answered Jan 21 at 15:18
bitinerantbitinerant
1113
add a comment |
2
2
2
If you want it to run every hour, then you need a number in the minute field. To run it at quarter past the hour, for example, use:
15 * * * * /var/www/script.sh
From man -i 5 crontab:
Commands are executed by cron(8) when the minute, hour, and month of year fields match the current
time, and when at least one of the two day fields (day of month, or day of week) match the current
time (see ``Note'' below). cron(8) examines cron entries once every minute. The time and date
fields are:
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sun, or use names)
A field may be an asterisk (*), which always stands for ``first-last''.
Ranges of numbers are allowed. Ranges are two numbers separated with a hyphen. The specified
range is inclusive. For example, 8-11 for an ``hours'' entry specifies execution at hours 8, 9, 10
and 11.
Lists are allowed. A list is a set of numbers (or ranges) separated by commas. Examples:
``1,2,5,9'', ``0-4,8-12''.
Step values can be used in conjunction with ranges. Following a range with ``/<number>'' specifies
skips of the number's value through the range. For example, ``0-23/2'' can be used in the hours
field to specify command execution every other hour (the alternative in the V7 standard is
``0,2,4,6,8,10,12,14,16,18,20,22''). Steps are also permitted after an asterisk, so if you want to
say ``every two hours'', just use ``*/2''.
answered Jan 21 at 15:18
bitinerantbitinerant
1113
If you want it to run every hour, then you need a number in the minute field. To run it at quarter past the hour, for example, use:
15 * * * * /var/www/script.sh
From man -i 5 crontab:
Commands are executed by cron(8) when the minute, hour, and month of year fields match the current
time, and when at least one of the two day fields (day of month, or day of week) match the current
time (see ``Note'' below). cron(8) examines cron entries once every minute. The time and date
fields are:
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sun, or use names)
A field may be an asterisk (*), which always stands for ``first-last''.
Ranges of numbers are allowed. Ranges are two numbers separated with a hyphen. The specified
range is inclusive. For example, 8-11 for an ``hours'' entry specifies execution at hours 8, 9, 10
and 11.
Lists are allowed. A list is a set of numbers (or ranges) separated by commas. Examples:
``1,2,5,9'', ``0-4,8-12''.
Step values can be used in conjunction with ranges. Following a range with ``/<number>'' specifies
skips of the number's value through the range. For example, ``0-23/2'' can be used in the hours
field to specify command execution every other hour (the alternative in the V7 standard is
``0,2,4,6,8,10,12,14,16,18,20,22''). Steps are also permitted after an asterisk, so if you want to
say ``every two hours'', just use ``*/2''.
answered Jan 21 at 15:18
bitinerantbitinerant
1113
answered Jan 21 at 15:18
bitinerantbitinerant
1113
answered Jan 21 at 15:18
bitinerantbitinerant
1113
answered Jan 21 at 15:18
bitinerantbitinerant
1113
1113
add a comment |
add a comment |
kubawich is a new contributor. Be nice, and check out our Code of Conduct.
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3
How long did you wait?
* */2 * * *would mean every minute of every even hour (i.e. when the hour is divisible by 2) - it won't run at all if the hour is odd– steeldriver
Jan 21 at 15:10
I want it to run once per hour. I was waiting one day now.
– kubawich
Jan 21 at 15:12
You could send the full output to a log file like this
* */2 * * * /var/www/script.sh >> /path/to/file.log 2>&1. That way you can see if there's any permission issue, and/or a bash programing one.– bistoco
Jan 21 at 15:13
2
For "once per hour", just change the first
*to any valid minute (from 0-59) and leave the hour field as*– steeldriver
Jan 21 at 15:15