No log content with tail but when terminating a process I see content with less

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
4
down vote

favorite












Basically, I am running:



nohup ./executable &> /tmp/out.log &


In order to make sure the process is running I ran the command:



tail -f /tmp/out.log


But the only thing I can get from tail is "nohup: ignoring input", and once killing the process that previously started I can see the contents of out.log






linux io-redirection tail nohup







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  • What is the question?
    – Peter Mortensen
    39 mins ago














up vote
4
down vote

favorite












Basically, I am running:



nohup ./executable &> /tmp/out.log &


In order to make sure the process is running I ran the command:



tail -f /tmp/out.log


But the only thing I can get from tail is "nohup: ignoring input", and once killing the process that previously started I can see the contents of out.log






linux io-redirection tail nohup







share|improve this question









New contributor




9uzman7 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.



















  • What is the question?
    – Peter Mortensen
    39 mins ago












up vote
4
down vote

favorite









up vote
4
down vote

favorite











Basically, I am running:



nohup ./executable &> /tmp/out.log &


In order to make sure the process is running I ran the command:



tail -f /tmp/out.log


But the only thing I can get from tail is "nohup: ignoring input", and once killing the process that previously started I can see the contents of out.log






linux io-redirection tail nohup







share|improve this question









New contributor




9uzman7 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











Basically, I am running:



nohup ./executable &> /tmp/out.log &


In order to make sure the process is running I ran the command:



tail -f /tmp/out.log


But the only thing I can get from tail is "nohup: ignoring input", and once killing the process that previously started I can see the contents of out.log






linux io-redirection tail nohup




linux io-redirection tail nohup






share|improve this question









New contributor




9uzman7 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









New contributor




9uzman7 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




share|improve this question








edited 18 mins ago









Goro

2,19641848




2,19641848






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asked 11 hours ago









9uzman7

233




233




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New contributor





9uzman7 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






9uzman7 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











  • What is the question?
    – Peter Mortensen
    39 mins ago
















  • What is the question?
    – Peter Mortensen
    39 mins ago















What is the question?
– Peter Mortensen
39 mins ago




What is the question?
– Peter Mortensen
39 mins ago










2 Answers
2






active

oldest

votes

















up vote
5
down vote



accepted










Run your program as:



nohup stdbuf -oL ./executable &> /tmp/out.log &


stdbuf can change the default buffering.






share|improve this answer




















  • this made the trick! THANKS!
    – 9uzman7
    11 hours ago

















up vote
4
down vote













Your executable is using buffered output, so you will only see something with tail if more than one block of output is produced. The size of such a block will be 4k or more.



If you wrote the executable yourself, change the output to line buffered or to not buffered.






share|improve this answer




















  • +1 Or add an instruction to flush stdout ; nonetheless we cannot give a better answer to such a vague question.
    – Rui F Ribeiro
    11 hours ago











  • makes sense, the executable is from the LoRa device provider. Is there an easy workaround? thanks for the response!
    – 9uzman7
    11 hours ago










  • You can allocate a pty and give that to the executable. Most programs use line buffered for a tty. Your program also does if you see immediate output if you run it directly from the shell.
    – RalfFriedl
    11 hours ago










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2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
5
down vote



accepted










Run your program as:



nohup stdbuf -oL ./executable &> /tmp/out.log &


stdbuf can change the default buffering.






share|improve this answer




















  • this made the trick! THANKS!
    – 9uzman7
    11 hours ago














up vote
5
down vote



accepted










Run your program as:



nohup stdbuf -oL ./executable &> /tmp/out.log &


stdbuf can change the default buffering.






share|improve this answer




















  • this made the trick! THANKS!
    – 9uzman7
    11 hours ago












up vote
5
down vote



accepted







up vote
5
down vote



accepted






Run your program as:



nohup stdbuf -oL ./executable &> /tmp/out.log &


stdbuf can change the default buffering.






share|improve this answer












Run your program as:



nohup stdbuf -oL ./executable &> /tmp/out.log &


stdbuf can change the default buffering.







share|improve this answer












share|improve this answer



share|improve this answer










answered 11 hours ago









Ipor Sircer

9,1701920




9,1701920











  • this made the trick! THANKS!
    – 9uzman7
    11 hours ago
















  • this made the trick! THANKS!
    – 9uzman7
    11 hours ago















this made the trick! THANKS!
– 9uzman7
11 hours ago




this made the trick! THANKS!
– 9uzman7
11 hours ago












up vote
4
down vote













Your executable is using buffered output, so you will only see something with tail if more than one block of output is produced. The size of such a block will be 4k or more.



If you wrote the executable yourself, change the output to line buffered or to not buffered.






share|improve this answer




















  • +1 Or add an instruction to flush stdout ; nonetheless we cannot give a better answer to such a vague question.
    – Rui F Ribeiro
    11 hours ago











  • makes sense, the executable is from the LoRa device provider. Is there an easy workaround? thanks for the response!
    – 9uzman7
    11 hours ago










  • You can allocate a pty and give that to the executable. Most programs use line buffered for a tty. Your program also does if you see immediate output if you run it directly from the shell.
    – RalfFriedl
    11 hours ago














up vote
4
down vote













Your executable is using buffered output, so you will only see something with tail if more than one block of output is produced. The size of such a block will be 4k or more.



If you wrote the executable yourself, change the output to line buffered or to not buffered.






share|improve this answer




















  • +1 Or add an instruction to flush stdout ; nonetheless we cannot give a better answer to such a vague question.
    – Rui F Ribeiro
    11 hours ago











  • makes sense, the executable is from the LoRa device provider. Is there an easy workaround? thanks for the response!
    – 9uzman7
    11 hours ago










  • You can allocate a pty and give that to the executable. Most programs use line buffered for a tty. Your program also does if you see immediate output if you run it directly from the shell.
    – RalfFriedl
    11 hours ago












up vote
4
down vote










up vote
4
down vote









Your executable is using buffered output, so you will only see something with tail if more than one block of output is produced. The size of such a block will be 4k or more.



If you wrote the executable yourself, change the output to line buffered or to not buffered.






share|improve this answer












Your executable is using buffered output, so you will only see something with tail if more than one block of output is produced. The size of such a block will be 4k or more.



If you wrote the executable yourself, change the output to line buffered or to not buffered.







share|improve this answer












share|improve this answer



share|improve this answer










answered 11 hours ago









RalfFriedl

3,5601522




3,5601522











  • +1 Or add an instruction to flush stdout ; nonetheless we cannot give a better answer to such a vague question.
    – Rui F Ribeiro
    11 hours ago











  • makes sense, the executable is from the LoRa device provider. Is there an easy workaround? thanks for the response!
    – 9uzman7
    11 hours ago










  • You can allocate a pty and give that to the executable. Most programs use line buffered for a tty. Your program also does if you see immediate output if you run it directly from the shell.
    – RalfFriedl
    11 hours ago
















  • +1 Or add an instruction to flush stdout ; nonetheless we cannot give a better answer to such a vague question.
    – Rui F Ribeiro
    11 hours ago











  • makes sense, the executable is from the LoRa device provider. Is there an easy workaround? thanks for the response!
    – 9uzman7
    11 hours ago










  • You can allocate a pty and give that to the executable. Most programs use line buffered for a tty. Your program also does if you see immediate output if you run it directly from the shell.
    – RalfFriedl
    11 hours ago















+1 Or add an instruction to flush stdout ; nonetheless we cannot give a better answer to such a vague question.
– Rui F Ribeiro
11 hours ago





+1 Or add an instruction to flush stdout ; nonetheless we cannot give a better answer to such a vague question.
– Rui F Ribeiro
11 hours ago













makes sense, the executable is from the LoRa device provider. Is there an easy workaround? thanks for the response!
– 9uzman7
11 hours ago




makes sense, the executable is from the LoRa device provider. Is there an easy workaround? thanks for the response!
– 9uzman7
11 hours ago












You can allocate a pty and give that to the executable. Most programs use line buffered for a tty. Your program also does if you see immediate output if you run it directly from the shell.
– RalfFriedl
11 hours ago




You can allocate a pty and give that to the executable. Most programs use line buffered for a tty. Your program also does if you see immediate output if you run it directly from the shell.
– RalfFriedl
11 hours ago










9uzman7 is a new contributor. Be nice, and check out our Code of Conduct.









 

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9uzman7 is a new contributor. Be nice, and check out our Code of Conduct.












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