Redirect stdout / stderr output to log file with timestamp
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I'm trying to redirect the stdout and stderr to a log file. The filename should be created dynamically with current timestamp.
I can create the filename with the following command:
$ date +%Y-%m-%d_%H-%M-%S.txt
2018-04-10_16-55-55.txt
So I want to do something like this:
mycommand &> (date +%Y-%m-%d_%H-%M-%S.txt)
But this doesn't work (-bash: syntax error near unexpected token('`)
io-redirection timestamps
asked Apr 10 at 14:01
Caner
1033
add a comment |Â
up vote
0
down vote
favorite
I'm trying to redirect the stdout and stderr to a log file. The filename should be created dynamically with current timestamp.
I can create the filename with the following command:
$ date +%Y-%m-%d_%H-%M-%S.txt
2018-04-10_16-55-55.txt
So I want to do something like this:
mycommand &> (date +%Y-%m-%d_%H-%M-%S.txt)
But this doesn't work (-bash: syntax error near unexpected token('`)
io-redirection timestamps
asked Apr 10 at 14:01
Caner
1033
Similar (no dupe): unix.stackexchange.com/questions/436800/…
– Kusalananda
Apr 10 at 17:03
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm trying to redirect the stdout and stderr to a log file. The filename should be created dynamically with current timestamp.
I can create the filename with the following command:
$ date +%Y-%m-%d_%H-%M-%S.txt
2018-04-10_16-55-55.txt
So I want to do something like this:
mycommand &> (date +%Y-%m-%d_%H-%M-%S.txt)
But this doesn't work (-bash: syntax error near unexpected token('`)
io-redirection timestamps
asked Apr 10 at 14:01
Caner
1033
I'm trying to redirect the stdout and stderr to a log file. The filename should be created dynamically with current timestamp.
I can create the filename with the following command:
$ date +%Y-%m-%d_%H-%M-%S.txt
2018-04-10_16-55-55.txt
So I want to do something like this:
mycommand &> (date +%Y-%m-%d_%H-%M-%S.txt)
But this doesn't work (-bash: syntax error near unexpected token('`)
io-redirection timestamps
asked Apr 10 at 14:01
Caner
1033
asked Apr 10 at 14:01
Caner
1033
asked Apr 10 at 14:01
Caner
1033
asked Apr 10 at 14:01
Caner
1033
1033
Similar (no dupe): unix.stackexchange.com/questions/436800/…
– Kusalananda
Apr 10 at 17:03
add a comment |Â
Similar (no dupe): unix.stackexchange.com/questions/436800/…
– Kusalananda
Apr 10 at 17:03
Similar (no dupe): unix.stackexchange.com/questions/436800/…
– Kusalananda
Apr 10 at 17:03
Similar (no dupe): unix.stackexchange.com/questions/436800/…
– Kusalananda
Apr 10 at 17:03
add a comment |Â
2 Answers
2
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oldest
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up vote
2
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accepted
Yes, you will need to use a command substitution:
mycommand &> "$(date +%Y-%m-%d_%H-%M-%S.txt)"
Which is bash-speak for
mycommand >"$(date +%Y-%m-%d_%H-%M-%S.txt)" 2>&1
Which is the same as
mycommand >"$(date +%F_%H-%M-%S.txt)" 2>&1
(%F is the same as %Y-%m-%d)
A command substitution, $(...), will be replaced by the output of the command inside.
What you used was a sub-shell, (...). A sub-shell can't accept redirections like that.
answered Apr 10 at 14:20
Kusalananda
102k13200317
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up vote
1
down vote
Try this:
today=`date +%Y-%m-%d_%H-%M-%S`; mycommand > $today.txt 2>&1
answered Apr 10 at 14:20
L.Ray
1967
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
Yes, you will need to use a command substitution:
mycommand &> "$(date +%Y-%m-%d_%H-%M-%S.txt)"
Which is bash-speak for
mycommand >"$(date +%Y-%m-%d_%H-%M-%S.txt)" 2>&1
Which is the same as
mycommand >"$(date +%F_%H-%M-%S.txt)" 2>&1
(%F is the same as %Y-%m-%d)
A command substitution, $(...), will be replaced by the output of the command inside.
What you used was a sub-shell, (...). A sub-shell can't accept redirections like that.
answered Apr 10 at 14:20
Kusalananda
102k13200317
add a comment |Â
up vote
2
down vote
accepted
Yes, you will need to use a command substitution:
mycommand &> "$(date +%Y-%m-%d_%H-%M-%S.txt)"
Which is bash-speak for
mycommand >"$(date +%Y-%m-%d_%H-%M-%S.txt)" 2>&1
Which is the same as
mycommand >"$(date +%F_%H-%M-%S.txt)" 2>&1
(%F is the same as %Y-%m-%d)
A command substitution, $(...), will be replaced by the output of the command inside.
What you used was a sub-shell, (...). A sub-shell can't accept redirections like that.
answered Apr 10 at 14:20
Kusalananda
102k13200317
add a comment |Â
up vote
2
down vote
accepted
up vote
2
down vote
accepted
Yes, you will need to use a command substitution:
mycommand &> "$(date +%Y-%m-%d_%H-%M-%S.txt)"
Which is bash-speak for
mycommand >"$(date +%Y-%m-%d_%H-%M-%S.txt)" 2>&1
Which is the same as
mycommand >"$(date +%F_%H-%M-%S.txt)" 2>&1
(%F is the same as %Y-%m-%d)
A command substitution, $(...), will be replaced by the output of the command inside.
What you used was a sub-shell, (...). A sub-shell can't accept redirections like that.
answered Apr 10 at 14:20
Kusalananda
102k13200317
Yes, you will need to use a command substitution:
mycommand &> "$(date +%Y-%m-%d_%H-%M-%S.txt)"
Which is bash-speak for
mycommand >"$(date +%Y-%m-%d_%H-%M-%S.txt)" 2>&1
Which is the same as
mycommand >"$(date +%F_%H-%M-%S.txt)" 2>&1
(%F is the same as %Y-%m-%d)
A command substitution, $(...), will be replaced by the output of the command inside.
What you used was a sub-shell, (...). A sub-shell can't accept redirections like that.
answered Apr 10 at 14:20
Kusalananda
102k13200317
edited Apr 10 at 14:36
answered Apr 10 at 14:20
Kusalananda
102k13200317
answered Apr 10 at 14:20
Kusalananda
102k13200317
answered Apr 10 at 14:20
Kusalananda
102k13200317
102k13200317
add a comment |Â
add a comment |Â
up vote
1
down vote
Try this:
today=`date +%Y-%m-%d_%H-%M-%S`; mycommand > $today.txt 2>&1
answered Apr 10 at 14:20
L.Ray
1967
add a comment |Â
up vote
1
down vote
Try this:
today=`date +%Y-%m-%d_%H-%M-%S`; mycommand > $today.txt 2>&1
answered Apr 10 at 14:20
L.Ray
1967
add a comment |Â
up vote
1
down vote
up vote
1
down vote
Try this:
today=`date +%Y-%m-%d_%H-%M-%S`; mycommand > $today.txt 2>&1
answered Apr 10 at 14:20
L.Ray
1967
Try this:
today=`date +%Y-%m-%d_%H-%M-%S`; mycommand > $today.txt 2>&1
answered Apr 10 at 14:20
L.Ray
1967
answered Apr 10 at 14:20
L.Ray
1967
answered Apr 10 at 14:20
L.Ray
1967
answered Apr 10 at 14:20
L.Ray
1967
1967
add a comment |Â
add a comment |Â
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Similar (no dupe): unix.stackexchange.com/questions/436800/…
– Kusalananda
Apr 10 at 17:03