10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a text file containing output from a command that contains lots of escape/control characters that when viewed using vi or view, looks like jibberish. But when viewed using the cat command the output is formatted properly.
Is there any way to take the output from the cat... (7 Replies)
Discussion started by: mrm5102
2. Shell Programming and Scripting
I have been having an extremely annoying problem. For the record, I am relatively new at this. I've only been working with unix-based OS's for roughly two years, mostly Xubuntu and some Kali. I am pretty familiar with the BASH language, as that's the default shell for debian. Now, I've made this... (16 Replies)
Discussion started by: Huitzilopochtli
3. IP Networking
Here's a situation:
I do all my work on a Mac. I have mysql installed on my mac.
1. There's a certain linux server 'server01' that provides access to
another linux server 'server02' via a pseudo terminal
So, to ssh into 'server02', I do this from my mac:
ssh -t server01... (1 Reply)
Discussion started by: imperialguy
4. UNIX for Dummies Questions & Answers
I am wondering if the DOS console works like the unix terminal? (1 Reply)
Discussion started by: vistastar
5. UNIX for Dummies Questions & Answers
Could you tell me if it is possible to add pseudo terminal name to the bash history?
I need to see from which terminal the command was issues. I found a variable HISTTIMEFORMAT that helps me to identify the time but cannot find similar thing for the pts number.
Pavel. (0 Replies)
Discussion started by: pn8830
Hello everyone, im having a hard time figuring out why the program posted below prints an extra newline every time I type the enter key.I suspect this has to do with the terminal line discipline, but I can't really understand why.I have tried turning on/off several terminal options and disable... (0 Replies)
Discussion started by: rlex
7. UNIX for Dummies Questions & Answers
How can i view what my colleague is doing in the terminal pts/1 while i have logged into terminal pts/2 ?? Both have remotely logged in via ssh. (4 Replies)
Discussion started by: proactiveaditya
8. UNIX for Dummies Questions & Answers
I finally got how to su - in my mac from the terminal. Now I would like to be able to add new users. useradd -m -d ..... doesn't seem to work. (1 Reply)
Discussion started by: bigmac18
9. UNIX for Advanced & Expert Users
I am trying to automate a SSH login using Keys using the following command
ssh -i id_rsa usernamw@ipaddr.
I am successful in doing this and i am getting the Warning Screen and I logon successfully.
but when I am executing the command
tail -1cf put.dat | ssh -i id_rsa username@ipaddr > get.dat ... (1 Reply)
Discussion started by: Shivdatta
Hi I have a system that gave me some messages on bootup that I was not used to seeing:
pseudo: pseudo-device: vol0
genunix: vol0 is /pseudo/vol@0
these came with these:
Feb 13 17:42:17 system1 eri: SUNW,eri0 : 100 Mbps full duplex link up
Feb 13 17:42:21 system1sendmail: My unqualified... (0 Replies)
Discussion started by: mndavies
PTS(4) Linux Programmer's Manual PTS(4)
ptmx, pts - pseudo-terminal master and slave
The file /dev/ptmx is a character file with major number 5 and minor number 2, usually of mode 0666 and owner.group of root.root. It is
used to create a pseudo-terminal master and slave pair.
When a process opens /dev/ptmx, it gets a file descriptor for a pseudo-terminal master (PTM), and a pseudo-terminal slave (PTS) device is
created in the /dev/pts directory. Each file descriptor obtained by opening /dev/ptmx is an independent PTM with its own associated PTS,
whose path can be found by passing the descriptor to ptsname(3).
Before opening the pseudo-terminal slave, you must pass the master's file descriptor to grantpt(3) and unlockpt(3).
Once both the pseudo-terminal master and slave are open, the slave provides processes with an interface that is identical to that of a real
Data written to the slave is presented on the master descriptor as input. Data written to the master is presented to the slave as input.
In practice, pseudo-terminals are used for implementing terminal emulators such as xterm(1), in which data read from the pseudo-terminal
master is interpreted by the application in the same way a real terminal would interpret the data, and for implementing remote-login pro-
grams such as sshd(8), in which data read from the pseudo-terminal master is sent across the network to a client program that is connected
to a terminal or terminal emulator.
Pseudo-terminals can also be used to send input to programs that normally refuse to read input from pipes (such as su(1), and passwd(1)).
The Linux support for the above (known as Unix98 pty naming) is done using the devpts file system, that should be mounted on /dev/pts.
Before this Unix98 scheme, master ptys were called /dev/ptyp0, ... and slave ptys /dev/ttyp0, ... and one needed lots of preallocated
getpt(3), grantpt(3), ptsname(3), unlockpt(3), pty(7)
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2002-10-09 PTS(4)