Cannot see log content with tail but when terminating process i can see content with less

Clash Royale CLAN TAG#URR8PPP

up vote
1
down vote

favorite

Im basically running:

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

and to make sure the process is running i want to do

tail -f /tmp/out.log

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

linux io-redirection tail nohup

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edited 49 mins ago

Rui F Ribeiro

36.5k1271116

asked 53 mins ago

9uzman7

83

New contributor

9uzman7 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment | 

up vote
1
down vote

favorite

Im basically running:

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

and to make sure the process is running i want to do

tail -f /tmp/out.log

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

linux io-redirection tail nohup

share|improve this question

edited 49 mins ago

Rui F Ribeiro

36.5k1271116

asked 53 mins ago

9uzman7

83

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.

add a comment | 

up vote
1
down vote

favorite

up vote
1
down vote

favorite

Im basically running:

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

and to make sure the process is running i want to do

tail -f /tmp/out.log

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

linux io-redirection tail nohup

share|improve this question

edited 49 mins ago

Rui F Ribeiro

36.5k1271116

asked 53 mins ago

9uzman7

83

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.

Im basically running:

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

and to make sure the process is running i want to do

tail -f /tmp/out.log

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

linux io-redirection tail nohup

linux io-redirection tail nohup

share|improve this question

edited 49 mins ago

Rui F Ribeiro

36.5k1271116

asked 53 mins ago

9uzman7

83

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

edited 49 mins ago

Rui F Ribeiro

36.5k1271116

asked 53 mins ago

9uzman7

83

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 49 mins ago

Rui F Ribeiro

36.5k1271116

edited 49 mins ago

Rui F Ribeiro

36.5k1271116

edited 49 mins ago

Rui F Ribeiro

36.5k1271116

36.5k1271116

asked 53 mins ago

9uzman7

83

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.

asked 53 mins ago

9uzman7

83

asked 53 mins ago

9uzman7

83

83

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.

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.

add a comment | 

add a comment | 

2 Answers
2

active

oldest

votes

up vote
3
down vote



accepted

Run your program as:

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

stdbuf can change the default buffering.

share|improve this answer

answered 28 mins ago

Ipor Sircer

9,1501920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  this made the trick! THANKS!
  – 9uzman7
  25 mins ago
  

  
  
  
  

add a comment | 

up vote
1
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

answered 42 mins ago

RalfFriedl

3,5201522

• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  

add a comment | 

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
3
down vote



accepted

Run your program as:

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

stdbuf can change the default buffering.

share|improve this answer

answered 28 mins ago

Ipor Sircer

9,1501920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  this made the trick! THANKS!
  – 9uzman7
  25 mins ago
  

  
  
  
  

add a comment | 

up vote
3
down vote



accepted

Run your program as:

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

stdbuf can change the default buffering.

share|improve this answer

answered 28 mins ago

Ipor Sircer

9,1501920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  this made the trick! THANKS!
  – 9uzman7
  25 mins ago
  

  
  
  
  

add a comment | 

up vote
3
down vote



accepted

up vote
3
down vote



accepted

Run your program as:

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

stdbuf can change the default buffering.

share|improve this answer

answered 28 mins ago

Ipor Sircer

9,1501920

Run your program as:

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

stdbuf can change the default buffering.

share|improve this answer

answered 28 mins ago

Ipor Sircer

9,1501920

share|improve this answer

share|improve this answer

answered 28 mins ago

Ipor Sircer

9,1501920

answered 28 mins ago

Ipor Sircer

9,1501920

answered 28 mins ago

Ipor Sircer

9,1501920

9,1501920

• 
  
  
  

  
  

  
  
  
  
  
  

  
  this made the trick! THANKS!
  – 9uzman7
  25 mins ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  this made the trick! THANKS!
  – 9uzman7
  25 mins ago
  

  
  
  
  

this made the trick! THANKS!
– 9uzman7
25 mins ago

this made the trick! THANKS!
– 9uzman7
25 mins ago

add a comment | 

up vote
1
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

answered 42 mins ago

RalfFriedl

3,5201522

• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  

add a comment | 

up vote
1
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

answered 42 mins ago

RalfFriedl

3,5201522

• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  

add a comment | 

up vote
1
down vote

up vote
1
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

answered 42 mins ago

RalfFriedl

3,5201522

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

answered 42 mins ago

RalfFriedl

3,5201522

share|improve this answer

share|improve this answer

answered 42 mins ago

RalfFriedl

3,5201522

answered 42 mins ago

RalfFriedl

3,5201522

answered 42 mins ago

RalfFriedl

3,5201522

3,5201522

• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  

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

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

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

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

add a comment | 

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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