Chain `top` output redirection and other commands
0
I'm trying to record system metrics using top while other processes are running. I'm hoping to chain things together, like so:
#!/bin/bash
# Redirect `top` output
top -U $USER > file.txt &&
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)'
When I run this, however, the latter two (Python) processes never complete. My goal is to start recording from top before any of the other processes start, then once those processes complete, stop recording from top.
shell unix
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
add a comment |
0
I'm trying to record system metrics using top while other processes are running. I'm hoping to chain things together, like so:
#!/bin/bash
# Redirect `top` output
top -U $USER > file.txt &&
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)'
When I run this, however, the latter two (Python) processes never complete. My goal is to start recording from top before any of the other processes start, then once those processes complete, stop recording from top.
shell unix
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
add a comment |
0
0
0
I'm trying to record system metrics using top while other processes are running. I'm hoping to chain things together, like so:
#!/bin/bash
# Redirect `top` output
top -U $USER > file.txt &&
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)'
When I run this, however, the latter two (Python) processes never complete. My goal is to start recording from top before any of the other processes start, then once those processes complete, stop recording from top.
shell unix
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
I'm trying to record system metrics using top while other processes are running. I'm hoping to chain things together, like so:
#!/bin/bash
# Redirect `top` output
top -U $USER > file.txt &&
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)'
When I run this, however, the latter two (Python) processes never complete. My goal is to start recording from top before any of the other processes start, then once those processes complete, stop recording from top.
shell unix
shell unix
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
asked Nov 28 '18 at 18:47
blacksiteblacksite
5,68241748
5,68241748
add a comment |
add a comment |
1 Answer
1
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oldest
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#run the first command in background
top -U $USER > file.txt &
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)' &&
# kill the command in background
kill %1
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
I get a syntax error:./runner.sh: line 4: syntax error near unexpected token&&' ./runner.sh: line 4:top -U $USER > file.txt & &&'
– blacksite
Nov 28 '18 at 19:07
Edited sorry for the error.
– Reda Meskali
Nov 28 '18 at 19:12
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
#run the first command in background
top -U $USER > file.txt &
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)' &&
# kill the command in background
kill %1
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
I get a syntax error:./runner.sh: line 4: syntax error near unexpected token&&' ./runner.sh: line 4:top -U $USER > file.txt & &&'
– blacksite
Nov 28 '18 at 19:07
Edited sorry for the error.
– Reda Meskali
Nov 28 '18 at 19:12
add a comment |
1
#run the first command in background
top -U $USER > file.txt &
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)' &&
# kill the command in background
kill %1
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
I get a syntax error:./runner.sh: line 4: syntax error near unexpected token&&' ./runner.sh: line 4:top -U $USER > file.txt & &&'
– blacksite
Nov 28 '18 at 19:07
Edited sorry for the error.
– Reda Meskali
Nov 28 '18 at 19:12
add a comment |
1
1
1
#run the first command in background
top -U $USER > file.txt &
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)' &&
# kill the command in background
kill %1
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
#run the first command in background
top -U $USER > file.txt &
# Then run a process that just sleeps for 4 seconds
python3 -c 'import time;time.sleep(4)' &&
# Then run another process that does the same
python3 -c 'import time;time.sleep(4)' &&
# kill the command in background
kill %1
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
edited Nov 28 '18 at 19:12
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
answered Nov 28 '18 at 18:55
Reda MeskaliReda Meskali
25139
25139
I get a syntax error:./runner.sh: line 4: syntax error near unexpected token&&' ./runner.sh: line 4:top -U $USER > file.txt & &&'
– blacksite
Nov 28 '18 at 19:07
Edited sorry for the error.
– Reda Meskali
Nov 28 '18 at 19:12
add a comment |
I get a syntax error:./runner.sh: line 4: syntax error near unexpected token&&' ./runner.sh: line 4:top -U $USER > file.txt & &&'
– blacksite
Nov 28 '18 at 19:07
Edited sorry for the error.
– Reda Meskali
Nov 28 '18 at 19:12
I get a syntax error:
./runner.sh: line 4: syntax error near unexpected token &&' ./runner.sh: line 4: top -U $USER > file.txt & &&'– blacksite
Nov 28 '18 at 19:07
I get a syntax error:
./runner.sh: line 4: syntax error near unexpected token &&' ./runner.sh: line 4: top -U $USER > file.txt & &&'– blacksite
Nov 28 '18 at 19:07
Edited sorry for the error.
– Reda Meskali
Nov 28 '18 at 19:12
Edited sorry for the error.
– Reda Meskali
Nov 28 '18 at 19:12
add a comment |
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