What is /dev/pts and why do we need it in Linux?

A quick check in /dev/pts shows a lot of entries but what are they for?:

 ls /dev/pts
0  10  12  14  16  18  2   21  23  25  27  29  30  32  4  6  8  ptmx
1  11  13  15  17  19  20  22  24  26  28  3   31  33  5  7  9

Basically they are pseudo-terminals, whereas a tty is a physical terminal (think of Ctrl + Alt + F1 being tty0 and F8 being tty7).

An easy way to test this is to keep opening new terminal windows (Ctrl+Shift+t)

Then type "tty" and you'll see each one has a higher /dev/pts number.

Pretty much anything such like ssh, bash that uses terminal input or output will create it's own /dev/pts.


Tags:

dev, pts, linux, entries, ls, ptmx, pseudo, terminals, whereas, tty, terminal, ctrl, alt, quot, ll, ssh, bash, input, output,

Latest Articles

  • Aruba/HP/Dell IAP Wireless Controller Common Default Passwords
  • Debian, Mint Ubuntu how to remove package and associated config files
  • Linux Grub not booting the intended kernel solution in Debian, Mint, Ubuntu how to specify which kernel to boot by default
  • QEMU KVM Keyboard Problems Not Working Right Repeating Characters, Ctrl+C Copy and Paste not working right when using PS2 mouse in guests Solution
  • Linux how to compile binary with static sharedobjects embedded instead of dynamic to use on multi-distributions and avoid glibc compatiblity issues
  • /bin/sh: msgfmt: not found error solution on Linux Compilation Ubuntu Debian Mint Centos
  • Mikrotik RouterOS CHR/ISO Basic and Quick Setup Howto Guide
  • qemu 4 compilation options
  • CentOS 7 8 PXEBoot Netinstall Not Working Solution "Pane is dead "new value non-exisetnt xfs filesystem is not valid as a default fs type"
  • CentOS 6 EOL yum repo won't work Error: Cannot find a valid baseurl for repo: base Solution
  • CentOS 7 8 How To Disable SELinux
  • Wordpress How To Add Featured Image To Post in Hueman Theme
  • kdenlive full reset how to erase all config files
  • CentOS 7 8 yum error Trying other mirror. To address this issue please refer to the below wiki article
  • Microsoft Teams Linux - Calendar Doesn't Work Missed Meetings!
  • Scanner not working in Linux Ubuntu Fedora Mint Debian over the network? Use sane-airscan!
  • How To Boot, Install and Run Windows 2000 on QEMU-KVM
  • bash cannot execute permission denied
  • Huion and Wacom Tablets How To Install in Linux Mint / Ubuntu and make the stylus work properly
  • ffmpeg how to cut certain parts of video out