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Prevent cronjob's from writing to /var/mail/$USER?
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In macOS, cronjobs configured with crontab have the command output and/or error messages (if the cron doesn't succeed) written to the /var/mail/$USER file. Can this be prevented? I've tried:
* * * * * /sbin/ping -c1 website.com ... 2>&1 >/dev/null
Whether it succeeds or fails to reach the domain, the ping output is saved to the mail file...
bash osx cron ping
edited 1 hour ago
Tomasz
10.6k73473
asked 1 hour ago
user357226user357226
1
New contributor
user357226 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 |
In macOS, cronjobs configured with crontab have the command output and/or error messages (if the cron doesn't succeed) written to the /var/mail/$USER file. Can this be prevented? I've tried:
* * * * * /sbin/ping -c1 website.com ... 2>&1 >/dev/null
Whether it succeeds or fails to reach the domain, the ping output is saved to the mail file...
bash osx cron ping
edited 1 hour ago
Tomasz
10.6k73473
asked 1 hour ago
user357226user357226
1
New contributor
user357226 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
You could state your shell too.
– Tomasz
1 hour ago
Huh? I'm not sure what you mean.
– user357226
1 hour ago
echo "$SHELL"should help, I guess.
– Tomasz
1 hour ago
My shell produces "/bin/bash". Can you give a small example of how this helps? I don't follow, sorry.
– user357226
1 hour ago
I'm don't know many shell, nor do I know the differences. In this case I guess this shouldn't make much difference unless you use a very exotic one. But it's a good habit to state what software is involved. Your question is about the shell after all!
– Tomasz
1 hour ago
add a comment |
In macOS, cronjobs configured with crontab have the command output and/or error messages (if the cron doesn't succeed) written to the /var/mail/$USER file. Can this be prevented? I've tried:
* * * * * /sbin/ping -c1 website.com ... 2>&1 >/dev/null
Whether it succeeds or fails to reach the domain, the ping output is saved to the mail file...
bash osx cron ping
edited 1 hour ago
Tomasz
10.6k73473
asked 1 hour ago
user357226user357226
1
New contributor
user357226 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
In macOS, cronjobs configured with crontab have the command output and/or error messages (if the cron doesn't succeed) written to the /var/mail/$USER file. Can this be prevented? I've tried:
* * * * * /sbin/ping -c1 website.com ... 2>&1 >/dev/null
Whether it succeeds or fails to reach the domain, the ping output is saved to the mail file...
bash osx cron ping
bash osx cron ping
edited 1 hour ago
Tomasz
10.6k73473
asked 1 hour ago
user357226user357226
1
New contributor
user357226 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 1 hour ago
Tomasz
10.6k73473
asked 1 hour ago
user357226user357226
1
New contributor
user357226 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 1 hour ago
Tomasz
10.6k73473
edited 1 hour ago
Tomasz
10.6k73473
edited 1 hour ago
Tomasz
10.6k73473
10.6k73473
asked 1 hour ago
user357226user357226
1
New contributor
user357226 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
user357226user357226
1
asked 1 hour ago
user357226user357226
1
1
New contributor
user357226 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
user357226 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
You could state your shell too.
– Tomasz
1 hour ago
Huh? I'm not sure what you mean.
– user357226
1 hour ago
echo "$SHELL"should help, I guess.
– Tomasz
1 hour ago
My shell produces "/bin/bash". Can you give a small example of how this helps? I don't follow, sorry.
– user357226
1 hour ago
I'm don't know many shell, nor do I know the differences. In this case I guess this shouldn't make much difference unless you use a very exotic one. But it's a good habit to state what software is involved. Your question is about the shell after all!
– Tomasz
1 hour ago
add a comment |
You could state your shell too.
– Tomasz
1 hour ago
Huh? I'm not sure what you mean.
– user357226
1 hour ago
echo "$SHELL"should help, I guess.
– Tomasz
1 hour ago
My shell produces "/bin/bash". Can you give a small example of how this helps? I don't follow, sorry.
– user357226
1 hour ago
I'm don't know many shell, nor do I know the differences. In this case I guess this shouldn't make much difference unless you use a very exotic one. But it's a good habit to state what software is involved. Your question is about the shell after all!
– Tomasz
1 hour ago
You could state your shell too.
– Tomasz
1 hour ago
You could state your shell too.
– Tomasz
1 hour ago
Huh? I'm not sure what you mean.
– user357226
1 hour ago
Huh? I'm not sure what you mean.
– user357226
1 hour ago
echo "$SHELL" should help, I guess.– Tomasz
1 hour ago
echo "$SHELL" should help, I guess.– Tomasz
1 hour ago
My shell produces "/bin/bash". Can you give a small example of how this helps? I don't follow, sorry.
– user357226
1 hour ago
My shell produces "/bin/bash". Can you give a small example of how this helps? I don't follow, sorry.
– user357226
1 hour ago
I'm don't know many shell, nor do I know the differences. In this case I guess this shouldn't make much difference unless you use a very exotic one. But it's a good habit to state what software is involved. Your question is about the shell after all!
– Tomasz
1 hour ago
I'm don't know many shell, nor do I know the differences. In this case I guess this shouldn't make much difference unless you use a very exotic one. But it's a good habit to state what software is involved. Your question is about the shell after all!
– Tomasz
1 hour ago
add a comment |
1 Answer
1
active
oldest
votes
2>&1 >/dev/null doesn't redirect both to /dev/null. It only redirects stdout, as the redirections are performed left to right. So it should only send sterr to mail. The right order is >/dev/null 2>&1. First stdout is redirected to /dev/null and then stderr to the same location (&1).
(I can't find out why it goes to mail by both failure and success in your case. I'm not a Mac user, so can't look around this. This seems unusual to me though - a Debian user.)
answered 1 hour ago
TomaszTomasz
10.6k73473
add a comment |
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2>&1 >/dev/null doesn't redirect both to /dev/null. It only redirects stdout, as the redirections are performed left to right. So it should only send sterr to mail. The right order is >/dev/null 2>&1. First stdout is redirected to /dev/null and then stderr to the same location (&1).
(I can't find out why it goes to mail by both failure and success in your case. I'm not a Mac user, so can't look around this. This seems unusual to me though - a Debian user.)
answered 1 hour ago
TomaszTomasz
10.6k73473
add a comment |
2>&1 >/dev/null doesn't redirect both to /dev/null. It only redirects stdout, as the redirections are performed left to right. So it should only send sterr to mail. The right order is >/dev/null 2>&1. First stdout is redirected to /dev/null and then stderr to the same location (&1).
(I can't find out why it goes to mail by both failure and success in your case. I'm not a Mac user, so can't look around this. This seems unusual to me though - a Debian user.)
answered 1 hour ago
TomaszTomasz
10.6k73473
add a comment |
2>&1 >/dev/null doesn't redirect both to /dev/null. It only redirects stdout, as the redirections are performed left to right. So it should only send sterr to mail. The right order is >/dev/null 2>&1. First stdout is redirected to /dev/null and then stderr to the same location (&1).
(I can't find out why it goes to mail by both failure and success in your case. I'm not a Mac user, so can't look around this. This seems unusual to me though - a Debian user.)
answered 1 hour ago
TomaszTomasz
10.6k73473
2>&1 >/dev/null doesn't redirect both to /dev/null. It only redirects stdout, as the redirections are performed left to right. So it should only send sterr to mail. The right order is >/dev/null 2>&1. First stdout is redirected to /dev/null and then stderr to the same location (&1).
(I can't find out why it goes to mail by both failure and success in your case. I'm not a Mac user, so can't look around this. This seems unusual to me though - a Debian user.)
answered 1 hour ago
TomaszTomasz
10.6k73473
edited 1 hour ago
answered 1 hour ago
TomaszTomasz
10.6k73473
answered 1 hour ago
TomaszTomasz
10.6k73473
answered 1 hour ago
TomaszTomasz
10.6k73473
10.6k73473
add a comment |
add a comment |
user357226 is a new contributor. Be nice, and check out our Code of Conduct.
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You could state your shell too.
– Tomasz
1 hour ago
Huh? I'm not sure what you mean.
– user357226
1 hour ago
echo "$SHELL"should help, I guess.– Tomasz
1 hour ago
My shell produces "/bin/bash". Can you give a small example of how this helps? I don't follow, sorry.
– user357226
1 hour ago
I'm don't know many shell, nor do I know the differences. In this case I guess this shouldn't make much difference unless you use a very exotic one. But it's a good habit to state what software is involved. Your question is about the shell after all!
– Tomasz
1 hour ago