How does Alt+F2 run a command directly as a child process of the init process?
On Lubuntu 18.04, if I click the desktop menu, and lxterminal in it, and run the the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lightdm,661
└─lightdm,862 --session-child 12 19
└─lxsession,944 -s Lubuntu -e LXDE
└─lxpanel,1087 --profile Lubuntu
└─lxterminal,23017
└─bash,23020
└─pstree,26853 -a -p -s 23020
If I hit alt+F2, and run lxterminal and run the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lxterminal,1480
└─bash,27000
└─pstree,27013 -a -p -s 27000
How does the second make lxterminal run directly as a child of systemd? Is it done by orphaning the lxterminal process and reparenting it to systemd? Thanks.
systemd process lxde
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
add a comment |
On Lubuntu 18.04, if I click the desktop menu, and lxterminal in it, and run the the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lightdm,661
└─lightdm,862 --session-child 12 19
└─lxsession,944 -s Lubuntu -e LXDE
└─lxpanel,1087 --profile Lubuntu
└─lxterminal,23017
└─bash,23020
└─pstree,26853 -a -p -s 23020
If I hit alt+F2, and run lxterminal and run the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lxterminal,1480
└─bash,27000
└─pstree,27013 -a -p -s 27000
How does the second make lxterminal run directly as a child of systemd? Is it done by orphaning the lxterminal process and reparenting it to systemd? Thanks.
systemd process lxde
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
add a comment |
On Lubuntu 18.04, if I click the desktop menu, and lxterminal in it, and run the the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lightdm,661
└─lightdm,862 --session-child 12 19
└─lxsession,944 -s Lubuntu -e LXDE
└─lxpanel,1087 --profile Lubuntu
└─lxterminal,23017
└─bash,23020
└─pstree,26853 -a -p -s 23020
If I hit alt+F2, and run lxterminal and run the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lxterminal,1480
└─bash,27000
└─pstree,27013 -a -p -s 27000
How does the second make lxterminal run directly as a child of systemd? Is it done by orphaning the lxterminal process and reparenting it to systemd? Thanks.
systemd process lxde
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
On Lubuntu 18.04, if I click the desktop menu, and lxterminal in it, and run the the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lightdm,661
└─lightdm,862 --session-child 12 19
└─lxsession,944 -s Lubuntu -e LXDE
└─lxpanel,1087 --profile Lubuntu
└─lxterminal,23017
└─bash,23020
└─pstree,26853 -a -p -s 23020
If I hit alt+F2, and run lxterminal and run the following in the terminal emulator window, I will get
$ pstree -a -p -s $$
systemd,1 --system --deserialize 19
└─lxterminal,1480
└─bash,27000
└─pstree,27013 -a -p -s 27000
How does the second make lxterminal run directly as a child of systemd? Is it done by orphaning the lxterminal process and reparenting it to systemd? Thanks.
systemd process lxde
systemd process lxde
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
asked Dec 20 '18 at 22:33
TimTim
7,99142103174
7,99142103174
add a comment |
add a comment |
1 Answer
1
active
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Read man nohup, which explains how to detach a process from the parent. Process 1 is made the parent. One of init's tasks is to harvest (and ignore) the process's exit status, and prevent "zombie" processes.
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
Can you explain the relation betw nohup and alt+F2?
– Tim
Dec 21 '18 at 1:44
Not in a comment. Readman -k process,man execve,man -a fork
– waltinator
Dec 21 '18 at 1:54
you missed the question in my post. sorry to point that out.
– Tim
Dec 21 '18 at 1:54
Alt-F2 startslxterminalwith theforkandexeccalls. Learning about them, and the othermanpages will show you that I did explain how. Read the manuals, Luke!
– waltinator
Dec 21 '18 at 2:01
Who is "Luke"? Do I remind you of someone you knew? I know what fork and exec do. I was asking about how alt+F2 runs a command as a child of the init process. The references you gave are about fork and exec and process. They and your reply don't address my question.
– Tim
Dec 21 '18 at 2:05
|
show 1 more comment
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Read man nohup, which explains how to detach a process from the parent. Process 1 is made the parent. One of init's tasks is to harvest (and ignore) the process's exit status, and prevent "zombie" processes.
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
Can you explain the relation betw nohup and alt+F2?
– Tim
Dec 21 '18 at 1:44
Not in a comment. Readman -k process,man execve,man -a fork
– waltinator
Dec 21 '18 at 1:54
you missed the question in my post. sorry to point that out.
– Tim
Dec 21 '18 at 1:54
Alt-F2 startslxterminalwith theforkandexeccalls. Learning about them, and the othermanpages will show you that I did explain how. Read the manuals, Luke!
– waltinator
Dec 21 '18 at 2:01
Who is "Luke"? Do I remind you of someone you knew? I know what fork and exec do. I was asking about how alt+F2 runs a command as a child of the init process. The references you gave are about fork and exec and process. They and your reply don't address my question.
– Tim
Dec 21 '18 at 2:05
|
show 1 more comment
Read man nohup, which explains how to detach a process from the parent. Process 1 is made the parent. One of init's tasks is to harvest (and ignore) the process's exit status, and prevent "zombie" processes.
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
Can you explain the relation betw nohup and alt+F2?
– Tim
Dec 21 '18 at 1:44
Not in a comment. Readman -k process,man execve,man -a fork
– waltinator
Dec 21 '18 at 1:54
you missed the question in my post. sorry to point that out.
– Tim
Dec 21 '18 at 1:54
Alt-F2 startslxterminalwith theforkandexeccalls. Learning about them, and the othermanpages will show you that I did explain how. Read the manuals, Luke!
– waltinator
Dec 21 '18 at 2:01
Who is "Luke"? Do I remind you of someone you knew? I know what fork and exec do. I was asking about how alt+F2 runs a command as a child of the init process. The references you gave are about fork and exec and process. They and your reply don't address my question.
– Tim
Dec 21 '18 at 2:05
|
show 1 more comment
Read man nohup, which explains how to detach a process from the parent. Process 1 is made the parent. One of init's tasks is to harvest (and ignore) the process's exit status, and prevent "zombie" processes.
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
Read man nohup, which explains how to detach a process from the parent. Process 1 is made the parent. One of init's tasks is to harvest (and ignore) the process's exit status, and prevent "zombie" processes.
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
answered Dec 21 '18 at 1:36
waltinatorwaltinator
22k74169
22k74169
Can you explain the relation betw nohup and alt+F2?
– Tim
Dec 21 '18 at 1:44
Not in a comment. Readman -k process,man execve,man -a fork
– waltinator
Dec 21 '18 at 1:54
you missed the question in my post. sorry to point that out.
– Tim
Dec 21 '18 at 1:54
Alt-F2 startslxterminalwith theforkandexeccalls. Learning about them, and the othermanpages will show you that I did explain how. Read the manuals, Luke!
– waltinator
Dec 21 '18 at 2:01
Who is "Luke"? Do I remind you of someone you knew? I know what fork and exec do. I was asking about how alt+F2 runs a command as a child of the init process. The references you gave are about fork and exec and process. They and your reply don't address my question.
– Tim
Dec 21 '18 at 2:05
|
show 1 more comment
Can you explain the relation betw nohup and alt+F2?
– Tim
Dec 21 '18 at 1:44
Not in a comment. Readman -k process,man execve,man -a fork
– waltinator
Dec 21 '18 at 1:54
you missed the question in my post. sorry to point that out.
– Tim
Dec 21 '18 at 1:54
Alt-F2 startslxterminalwith theforkandexeccalls. Learning about them, and the othermanpages will show you that I did explain how. Read the manuals, Luke!
– waltinator
Dec 21 '18 at 2:01
Who is "Luke"? Do I remind you of someone you knew? I know what fork and exec do. I was asking about how alt+F2 runs a command as a child of the init process. The references you gave are about fork and exec and process. They and your reply don't address my question.
– Tim
Dec 21 '18 at 2:05
Can you explain the relation betw nohup and alt+F2?
– Tim
Dec 21 '18 at 1:44
Can you explain the relation betw nohup and alt+F2?
– Tim
Dec 21 '18 at 1:44
Not in a comment. Read
man -k process, man execve, man -a fork– waltinator
Dec 21 '18 at 1:54
Not in a comment. Read
man -k process, man execve, man -a fork– waltinator
Dec 21 '18 at 1:54
you missed the question in my post. sorry to point that out.
– Tim
Dec 21 '18 at 1:54
you missed the question in my post. sorry to point that out.
– Tim
Dec 21 '18 at 1:54
Alt-F2 starts
lxterminal with the fork and exec calls. Learning about them, and the other man pages will show you that I did explain how. Read the manuals, Luke!– waltinator
Dec 21 '18 at 2:01
Alt-F2 starts
lxterminal with the fork and exec calls. Learning about them, and the other man pages will show you that I did explain how. Read the manuals, Luke!– waltinator
Dec 21 '18 at 2:01
Who is "Luke"? Do I remind you of someone you knew? I know what fork and exec do. I was asking about how alt+F2 runs a command as a child of the init process. The references you gave are about fork and exec and process. They and your reply don't address my question.
– Tim
Dec 21 '18 at 2:05
Who is "Luke"? Do I remind you of someone you knew? I know what fork and exec do. I was asking about how alt+F2 runs a command as a child of the init process. The references you gave are about fork and exec and process. They and your reply don't address my question.
– Tim
Dec 21 '18 at 2:05
|
show 1 more comment
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