What is this shell doing and how to find it out?

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Today my server slowed down greatly. Most resource-consuming are - surprisingly - two shells. Two ZSH processes on TTY 0 (what does that mean?).



> ps axjf
12474 8947 16532 16532 ? -1 Sl 1000 0:34 _ /usr/bin/xfce4
-terminal
 8947 8953 16532 16532 ? -1 S 1000 0:00 | _ gnome-pty-
helper
 8947 24044 24044 24044 ? -1 Rs 1000 87:01 | _ zsh
 8947 24176 24176 24176 ? -1 Rs 1000 86:45 | _ zsh
 8947 31137 31137 31137 pts/2 2313 Ss 1000 0:00 | _ zsh
31137 2313 2313 31137 pts/2 2313 R+ 1000 0:00 | _ ps


htop reports



Before I kill these, how to find out what are they doing?



Running:



  1. Ubuntu 16.04.3 LTS

  2. ZSH (version says zsh 5.1.1 (x86_64-ubuntu-linux-gnu)) with Oh-My-ZSH

  3. Kernel, dm, etc.
    inxi -S -xxx
    System: Host: T420s Kernel: 4.4.0-104-generic x86_64 (64 bit gcc: 5.4.0) Desktop: Xfce 4.12.3 (Gtk 2.24.28) info: xfce4-panel dm: lightdm Distro: Ubuntu 16.04 xenial



zsh oh-my-zsh




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  • 2




    Uninstall OMZ and your problems will magically disappear...
    – jasonwryan
    Jan 23 at 17:58














up vote
1
down vote

favorite
1












Today my server slowed down greatly. Most resource-consuming are - surprisingly - two shells. Two ZSH processes on TTY 0 (what does that mean?).



> ps axjf
12474 8947 16532 16532 ? -1 Sl 1000 0:34 _ /usr/bin/xfce4
-terminal
 8947 8953 16532 16532 ? -1 S 1000 0:00 | _ gnome-pty-
helper
 8947 24044 24044 24044 ? -1 Rs 1000 87:01 | _ zsh
 8947 24176 24176 24176 ? -1 Rs 1000 86:45 | _ zsh
 8947 31137 31137 31137 pts/2 2313 Ss 1000 0:00 | _ zsh
31137 2313 2313 31137 pts/2 2313 R+ 1000 0:00 | _ ps


htop reports



Before I kill these, how to find out what are they doing?



Running:



  1. Ubuntu 16.04.3 LTS

  2. ZSH (version says zsh 5.1.1 (x86_64-ubuntu-linux-gnu)) with Oh-My-ZSH

  3. Kernel, dm, etc.
    inxi -S -xxx
    System: Host: T420s Kernel: 4.4.0-104-generic x86_64 (64 bit gcc: 5.4.0) Desktop: Xfce 4.12.3 (Gtk 2.24.28) info: xfce4-panel dm: lightdm Distro: Ubuntu 16.04 xenial



zsh oh-my-zsh




share|improve this question
















  • 2




    Uninstall OMZ and your problems will magically disappear...
    – jasonwryan
    Jan 23 at 17:58












up vote
1
down vote

favorite
1









up vote
1
down vote

favorite
1






1





Today my server slowed down greatly. Most resource-consuming are - surprisingly - two shells. Two ZSH processes on TTY 0 (what does that mean?).



> ps axjf
12474 8947 16532 16532 ? -1 Sl 1000 0:34 _ /usr/bin/xfce4
-terminal
 8947 8953 16532 16532 ? -1 S 1000 0:00 | _ gnome-pty-
helper
 8947 24044 24044 24044 ? -1 Rs 1000 87:01 | _ zsh
 8947 24176 24176 24176 ? -1 Rs 1000 86:45 | _ zsh
 8947 31137 31137 31137 pts/2 2313 Ss 1000 0:00 | _ zsh
31137 2313 2313 31137 pts/2 2313 R+ 1000 0:00 | _ ps


htop reports



Before I kill these, how to find out what are they doing?



Running:



  1. Ubuntu 16.04.3 LTS

  2. ZSH (version says zsh 5.1.1 (x86_64-ubuntu-linux-gnu)) with Oh-My-ZSH

  3. Kernel, dm, etc.
    inxi -S -xxx
    System: Host: T420s Kernel: 4.4.0-104-generic x86_64 (64 bit gcc: 5.4.0) Desktop: Xfce 4.12.3 (Gtk 2.24.28) info: xfce4-panel dm: lightdm Distro: Ubuntu 16.04 xenial



zsh oh-my-zsh




share|improve this question












Today my server slowed down greatly. Most resource-consuming are - surprisingly - two shells. Two ZSH processes on TTY 0 (what does that mean?).



> ps axjf
12474 8947 16532 16532 ? -1 Sl 1000 0:34 _ /usr/bin/xfce4
-terminal
 8947 8953 16532 16532 ? -1 S 1000 0:00 | _ gnome-pty-
helper
 8947 24044 24044 24044 ? -1 Rs 1000 87:01 | _ zsh
 8947 24176 24176 24176 ? -1 Rs 1000 86:45 | _ zsh
 8947 31137 31137 31137 pts/2 2313 Ss 1000 0:00 | _ zsh
31137 2313 2313 31137 pts/2 2313 R+ 1000 0:00 | _ ps


htop reports



Before I kill these, how to find out what are they doing?



Running:



  1. Ubuntu 16.04.3 LTS

  2. ZSH (version says zsh 5.1.1 (x86_64-ubuntu-linux-gnu)) with Oh-My-ZSH

  3. Kernel, dm, etc.
    inxi -S -xxx
    System: Host: T420s Kernel: 4.4.0-104-generic x86_64 (64 bit gcc: 5.4.0) Desktop: Xfce 4.12.3 (Gtk 2.24.28) info: xfce4-panel dm: lightdm Distro: Ubuntu 16.04 xenial




zsh oh-my-zsh





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asked Jan 23 at 17:57









LIttle Ancient Forest Kami

273213




273213







  • 2




    Uninstall OMZ and your problems will magically disappear...
    – jasonwryan
    Jan 23 at 17:58












  • 2




    Uninstall OMZ and your problems will magically disappear...
    – jasonwryan
    Jan 23 at 17:58







2




2




Uninstall OMZ and your problems will magically disappear...
– jasonwryan
Jan 23 at 17:58




Uninstall OMZ and your problems will magically disappear...
– jasonwryan
Jan 23 at 17:58










1 Answer
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1
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Before I kill these, how to find out what are they doing?




strace them, for starters. In a pinch, use a debugger.




what does that mean?




It means that they have no controlling terminal. Given that they are children of XFCE Terminal (right there as /usr/bin/xfce4-terminal in your process tree), you should also look to the terminal emulator sessions on your GUI.






share|improve this answer






















  • I thought as much but I'm only using Terminator and I closed down ALL it's windows. Additionally, when I did echo $$ in them, I got different PIDs. Unless I misunderstand "terminal emulator sessions". Am following up on strace now, thank you.
    – LIttle Ancient Forest Kami
    Jan 24 at 8:47










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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
1
down vote



accepted











Before I kill these, how to find out what are they doing?




strace them, for starters. In a pinch, use a debugger.




what does that mean?




It means that they have no controlling terminal. Given that they are children of XFCE Terminal (right there as /usr/bin/xfce4-terminal in your process tree), you should also look to the terminal emulator sessions on your GUI.






share|improve this answer






















  • I thought as much but I'm only using Terminator and I closed down ALL it's windows. Additionally, when I did echo $$ in them, I got different PIDs. Unless I misunderstand "terminal emulator sessions". Am following up on strace now, thank you.
    – LIttle Ancient Forest Kami
    Jan 24 at 8:47














up vote
1
down vote



accepted











Before I kill these, how to find out what are they doing?




strace them, for starters. In a pinch, use a debugger.




what does that mean?




It means that they have no controlling terminal. Given that they are children of XFCE Terminal (right there as /usr/bin/xfce4-terminal in your process tree), you should also look to the terminal emulator sessions on your GUI.






share|improve this answer






















  • I thought as much but I'm only using Terminator and I closed down ALL it's windows. Additionally, when I did echo $$ in them, I got different PIDs. Unless I misunderstand "terminal emulator sessions". Am following up on strace now, thank you.
    – LIttle Ancient Forest Kami
    Jan 24 at 8:47












up vote
1
down vote



accepted







up vote
1
down vote



accepted







Before I kill these, how to find out what are they doing?




strace them, for starters. In a pinch, use a debugger.




what does that mean?




It means that they have no controlling terminal. Given that they are children of XFCE Terminal (right there as /usr/bin/xfce4-terminal in your process tree), you should also look to the terminal emulator sessions on your GUI.






share|improve this answer















Before I kill these, how to find out what are they doing?




strace them, for starters. In a pinch, use a debugger.




what does that mean?




It means that they have no controlling terminal. Given that they are children of XFCE Terminal (right there as /usr/bin/xfce4-terminal in your process tree), you should also look to the terminal emulator sessions on your GUI.







share|improve this answer














share|improve this answer



share|improve this answer








edited Jan 25 at 10:10

























answered Jan 23 at 18:28









JdeBP

28.6k459134




28.6k459134











  • I thought as much but I'm only using Terminator and I closed down ALL it's windows. Additionally, when I did echo $$ in them, I got different PIDs. Unless I misunderstand "terminal emulator sessions". Am following up on strace now, thank you.
    – LIttle Ancient Forest Kami
    Jan 24 at 8:47
















  • I thought as much but I'm only using Terminator and I closed down ALL it's windows. Additionally, when I did echo $$ in them, I got different PIDs. Unless I misunderstand "terminal emulator sessions". Am following up on strace now, thank you.
    – LIttle Ancient Forest Kami
    Jan 24 at 8:47















I thought as much but I'm only using Terminator and I closed down ALL it's windows. Additionally, when I did echo $$ in them, I got different PIDs. Unless I misunderstand "terminal emulator sessions". Am following up on strace now, thank you.
– LIttle Ancient Forest Kami
Jan 24 at 8:47




I thought as much but I'm only using Terminator and I closed down ALL it's windows. Additionally, when I did echo $$ in them, I got different PIDs. Unless I misunderstand "terminal emulator sessions". Am following up on strace now, thank you.
– LIttle Ancient Forest Kami
Jan 24 at 8:47












 

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