How do ` -f` and `-o` interact in `ps`?ps: output modifiers vs output format controlps: error: conflicting...
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How do ` -f` and `-o` interact in `ps`?
ps: output modifiers vs output format controlps: error: conflicting format options-p and -o comm doesn't work together?How do I tell `ps` to use all available columns?How to find the PID of nginx processhow to print ps header when using pipe in linuxHow to determine which script is being executed by bash?How to group processes with the same nameps: format (separator and width)How long does my Java process run?How can I logically AND two selection conditions in ps?How can I use `--lines` `--row` modifiers in `ps` command
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How do -f and -o interact in ps?
They shouldn't work together, according to ps: output modifiers vs output format control and https://unix.stackexchange.com/a/446198/674, since -f implicitly specifies the fields, while -o allows user to specify the fields.
man ps says
-f Do full-format listing. This option can be combined with many other UNIX-style options to add additional columns. It also causes the command arguments to be
printed. When used with -L, the NLWP (number of threads) and LWP (thread ID) columns will be added. See the c option, the format keyword args, and the format
keyword comm.
f ASCII art process hierarchy (forest).
They seem to be unrelated options/arguments.
But why
ps -f -o cmdworks just likeps f, showing the parent-child relation?
ps -f -o ...select the same number of processes asps f?
$ ps f | wc -l
224
$ ps -f -o pid | wc -l
224
ps -fselects different processes with and without-o?
$ ps -f | wc -l
5
-eseems not work here?
$ ps -e -f -o pid,ppid,comm | wc -l
224
$ ps -e -f | wc -l
414
$ ps -e -o pid,ppid,comm | wc -l
414
Thanks.
ps
asked yesterday
TimTim
28.4k79269491
add a comment |
How do -f and -o interact in ps?
They shouldn't work together, according to ps: output modifiers vs output format control and https://unix.stackexchange.com/a/446198/674, since -f implicitly specifies the fields, while -o allows user to specify the fields.
man ps says
-f Do full-format listing. This option can be combined with many other UNIX-style options to add additional columns. It also causes the command arguments to be
printed. When used with -L, the NLWP (number of threads) and LWP (thread ID) columns will be added. See the c option, the format keyword args, and the format
keyword comm.
f ASCII art process hierarchy (forest).
They seem to be unrelated options/arguments.
But why
ps -f -o cmdworks just likeps f, showing the parent-child relation?
ps -f -o ...select the same number of processes asps f?
$ ps f | wc -l
224
$ ps -f -o pid | wc -l
224
ps -fselects different processes with and without-o?
$ ps -f | wc -l
5
-eseems not work here?
$ ps -e -f -o pid,ppid,comm | wc -l
224
$ ps -e -f | wc -l
414
$ ps -e -o pid,ppid,comm | wc -l
414
Thanks.
ps
asked yesterday
TimTim
28.4k79269491
add a comment |
How do -f and -o interact in ps?
They shouldn't work together, according to ps: output modifiers vs output format control and https://unix.stackexchange.com/a/446198/674, since -f implicitly specifies the fields, while -o allows user to specify the fields.
man ps says
-f Do full-format listing. This option can be combined with many other UNIX-style options to add additional columns. It also causes the command arguments to be
printed. When used with -L, the NLWP (number of threads) and LWP (thread ID) columns will be added. See the c option, the format keyword args, and the format
keyword comm.
f ASCII art process hierarchy (forest).
They seem to be unrelated options/arguments.
But why
ps -f -o cmdworks just likeps f, showing the parent-child relation?
ps -f -o ...select the same number of processes asps f?
$ ps f | wc -l
224
$ ps -f -o pid | wc -l
224
ps -fselects different processes with and without-o?
$ ps -f | wc -l
5
-eseems not work here?
$ ps -e -f -o pid,ppid,comm | wc -l
224
$ ps -e -f | wc -l
414
$ ps -e -o pid,ppid,comm | wc -l
414
Thanks.
ps
asked yesterday
TimTim
28.4k79269491
How do -f and -o interact in ps?
They shouldn't work together, according to ps: output modifiers vs output format control and https://unix.stackexchange.com/a/446198/674, since -f implicitly specifies the fields, while -o allows user to specify the fields.
man ps says
-f Do full-format listing. This option can be combined with many other UNIX-style options to add additional columns. It also causes the command arguments to be
printed. When used with -L, the NLWP (number of threads) and LWP (thread ID) columns will be added. See the c option, the format keyword args, and the format
keyword comm.
f ASCII art process hierarchy (forest).
They seem to be unrelated options/arguments.
But why
ps -f -o cmdworks just likeps f, showing the parent-child relation?
ps -f -o ...select the same number of processes asps f?
$ ps f | wc -l
224
$ ps -f -o pid | wc -l
224
ps -fselects different processes with and without-o?
$ ps -f | wc -l
5
-eseems not work here?
$ ps -e -f -o pid,ppid,comm | wc -l
224
$ ps -e -f | wc -l
414
$ ps -e -o pid,ppid,comm | wc -l
414
Thanks.
ps
ps
asked yesterday
TimTim
28.4k79269491
asked yesterday
TimTim
28.4k79269491
edited yesterday
Tim
asked yesterday
TimTim
28.4k79269491
asked yesterday
TimTim
28.4k79269491
asked yesterday
TimTim
28.4k79269491
28.4k79269491
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
The ps in a lot of Gnu/Linuxes has compatibility with at least two versions of ps: from system V and BSD. Some options are from one, and some from the other.
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
I can't get my head around the manual, and just use the same few options. If anyone can reference a better manual, then +1 from me.
– ctrl-alt-delor
yesterday
add a comment |
1. and 2.:
Yes, ps -f -o ... works just like ps f, because ps -f -o ... outputs the same as ps f -o ... which is the output as process hierarchy.
Example:
ps -f -o user,pid,ppid,cmd
# is the same as
ps f -o user,pid,ppid,cmd
3.
ps -f seems to select all processes of your current shell (tty) while while ps -f -o ... outputs the processes of all ttys.
Example:
ps -f
# selects the same processes of current tty as
ps -o user,pid,ppid,cmd,tty
# and... have a look at the tty value here
ps -f -o user,pid,ppid,cmd,tty
4.
Yes, ps -ef doesn't seem to work with -o. You can add -H for a hierarchy like in ps -eH -o user,pid,ppid,cmd.
answered yesterday
FreddyFreddy
1,514210
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
The ps in a lot of Gnu/Linuxes has compatibility with at least two versions of ps: from system V and BSD. Some options are from one, and some from the other.
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
I can't get my head around the manual, and just use the same few options. If anyone can reference a better manual, then +1 from me.
– ctrl-alt-delor
yesterday
add a comment |
The ps in a lot of Gnu/Linuxes has compatibility with at least two versions of ps: from system V and BSD. Some options are from one, and some from the other.
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
I can't get my head around the manual, and just use the same few options. If anyone can reference a better manual, then +1 from me.
– ctrl-alt-delor
yesterday
add a comment |
The ps in a lot of Gnu/Linuxes has compatibility with at least two versions of ps: from system V and BSD. Some options are from one, and some from the other.
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
The ps in a lot of Gnu/Linuxes has compatibility with at least two versions of ps: from system V and BSD. Some options are from one, and some from the other.
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
answered yesterday
ctrl-alt-delorctrl-alt-delor
12.4k52661
12.4k52661
I can't get my head around the manual, and just use the same few options. If anyone can reference a better manual, then +1 from me.
– ctrl-alt-delor
yesterday
add a comment |
I can't get my head around the manual, and just use the same few options. If anyone can reference a better manual, then +1 from me.
– ctrl-alt-delor
yesterday
I can't get my head around the manual, and just use the same few options. If anyone can reference a better manual, then +1 from me.
– ctrl-alt-delor
yesterday
I can't get my head around the manual, and just use the same few options. If anyone can reference a better manual, then +1 from me.
– ctrl-alt-delor
yesterday
add a comment |
1. and 2.:
Yes, ps -f -o ... works just like ps f, because ps -f -o ... outputs the same as ps f -o ... which is the output as process hierarchy.
Example:
ps -f -o user,pid,ppid,cmd
# is the same as
ps f -o user,pid,ppid,cmd
3.
ps -f seems to select all processes of your current shell (tty) while while ps -f -o ... outputs the processes of all ttys.
Example:
ps -f
# selects the same processes of current tty as
ps -o user,pid,ppid,cmd,tty
# and... have a look at the tty value here
ps -f -o user,pid,ppid,cmd,tty
4.
Yes, ps -ef doesn't seem to work with -o. You can add -H for a hierarchy like in ps -eH -o user,pid,ppid,cmd.
answered yesterday
FreddyFreddy
1,514210
add a comment |
1. and 2.:
Yes, ps -f -o ... works just like ps f, because ps -f -o ... outputs the same as ps f -o ... which is the output as process hierarchy.
Example:
ps -f -o user,pid,ppid,cmd
# is the same as
ps f -o user,pid,ppid,cmd
3.
ps -f seems to select all processes of your current shell (tty) while while ps -f -o ... outputs the processes of all ttys.
Example:
ps -f
# selects the same processes of current tty as
ps -o user,pid,ppid,cmd,tty
# and... have a look at the tty value here
ps -f -o user,pid,ppid,cmd,tty
4.
Yes, ps -ef doesn't seem to work with -o. You can add -H for a hierarchy like in ps -eH -o user,pid,ppid,cmd.
answered yesterday
FreddyFreddy
1,514210
add a comment |
1. and 2.:
Yes, ps -f -o ... works just like ps f, because ps -f -o ... outputs the same as ps f -o ... which is the output as process hierarchy.
Example:
ps -f -o user,pid,ppid,cmd
# is the same as
ps f -o user,pid,ppid,cmd
3.
ps -f seems to select all processes of your current shell (tty) while while ps -f -o ... outputs the processes of all ttys.
Example:
ps -f
# selects the same processes of current tty as
ps -o user,pid,ppid,cmd,tty
# and... have a look at the tty value here
ps -f -o user,pid,ppid,cmd,tty
4.
Yes, ps -ef doesn't seem to work with -o. You can add -H for a hierarchy like in ps -eH -o user,pid,ppid,cmd.
answered yesterday
FreddyFreddy
1,514210
1. and 2.:
Yes, ps -f -o ... works just like ps f, because ps -f -o ... outputs the same as ps f -o ... which is the output as process hierarchy.
Example:
ps -f -o user,pid,ppid,cmd
# is the same as
ps f -o user,pid,ppid,cmd
3.
ps -f seems to select all processes of your current shell (tty) while while ps -f -o ... outputs the processes of all ttys.
Example:
ps -f
# selects the same processes of current tty as
ps -o user,pid,ppid,cmd,tty
# and... have a look at the tty value here
ps -f -o user,pid,ppid,cmd,tty
4.
Yes, ps -ef doesn't seem to work with -o. You can add -H for a hierarchy like in ps -eH -o user,pid,ppid,cmd.
answered yesterday
FreddyFreddy
1,514210
answered yesterday
FreddyFreddy
1,514210
answered yesterday
FreddyFreddy
1,514210
answered yesterday
FreddyFreddy
1,514210
1,514210
add a comment |
add a comment |
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