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== Symptoms ==
 
  
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<pre>
 
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error: open pty: No such file or directory
 
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</pre>
 
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== Solutions ==
 
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=== Using strace ===
 
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You can use [http://linux.die.net/man/1/strace strace] to analyse the command further:
 
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<pre>
 
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# strace -ff vzctl enter 101
 
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....
 
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fstat64(...st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0)...) fail
 
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....
 
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</pre>
 
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Recompile the kernel with the following option:
 
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CONFIG_LEGACY_PTYS=y
 
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=== LEGACY_PTYS ===
 
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==== Temporary fix ====
 
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''Note: This is a temporary fix so you can enter the VE.''
 
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* Create the LEGACY_PTYS devices:
 
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vzctl exec 101 /sbin/MAKEDEV tty
 
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vzctl exec 101 /sbin/MAKEDEV pty
 
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vzctl exec 101 mknod --mode=666 /dev/ptmx c 5 2
 
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vzctl enter 101
 
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==== Permanent fix with udev ====
 
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* For a permanent fix with udev, you will need to force udev to make LEGACY_PTYS:
 
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cat > /etc/udev/makedev.d/51-udev.nodes
 
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# These device have to be created manually
 
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tty0
 
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tty1
 
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tty2
 
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tty3
 
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....
 
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ttyp0
 
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ttyp1
 
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ttyp2
 
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ttyp3
 
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....
 
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ptyp0
 
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ptyp1
 
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ptyp2
 
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ptyp3
 
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....
 
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==== Permanent fix without udev ====
 
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* Alternatively, you can disable udev:
 
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Edit the ''/etc/rc.d/rc.sysinit'' file and comment out the ''/sbin/start_udev'' line
 
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Or you can run the following command:
 
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sed -i 's|/sbin/start_udev|#/sbin/start_udev|g' /etc/rc.d/rc.sysinit
 
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''Warning'' Updates to the package which owns this file may revert your changes.
 
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''Note'' This was tested with CentOS VE.
 
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=== Debian only ===
 
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* Enter the VE manually
 
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CTID=101
 
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vzctl exec $CTID "mount -t devpts devpts /dev/pts"
 
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vzctl enter $CTID
 
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* Remove udev using apt
 
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CTID=101
 
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vzctl exec $CTID apt-get remove udev
 
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vzctl restart $CTID
 
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=== Older Slackware ===
 
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Check that /dev/pts is mounted under the container as a devpts filesystem:
 
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vzctl exec VEID mount
 
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If it is not, try this immediate fix:
 
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vzctl exec VEID mount /dev/pts
 
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You should now be able to enter the VPS. You will need to fix /etc/rc.d/rc.S and/or /etc/fstab to ensure that /dev/pts is mounted in the boot process.
 
  
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== See also ==
 
== See also ==

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