https://wiki.openvz.org/api.php?action=feedcontributions&feedformat=atom&user=NatarajOpenVZ Virtuozzo Containers Wiki - User contributions [en]2026-06-13T16:34:30ZUser contributionsMediaWiki 1.31.1https://wiki.openvz.org/index.php?title=Container_enter_failed&diff=15576Container enter failed2014-09-30T19:30:30Z<p>Nataraj: </p>
<hr />
<div>== Symptoms ==<br />
<br />
<pre><br />
error: open pty: No such file or directory<br />
</pre><br />
<br />
== Solutions ==<br />
<br />
=== Using strace ===<br />
<br />
You can use [http://linux.die.net/man/1/strace strace] to analyse the command further:<br />
<pre><br />
# strace -ff vzctl enter 101<br />
....<br />
fstat64(...st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0)...) fail<br />
....<br />
</pre><br />
<br />
Recompile the kernel with the following option:<br />
CONFIG_LEGACY_PTYS=y<br />
<br />
=== LEGACY_PTYS ===<br />
<br />
==== Temporary fix ====<br />
''Note: This is a temporary fix so you can enter the VE.''<br />
<br />
* Create the LEGACY_PTYS devices:<br />
<br />
vzctl exec 101 /sbin/MAKEDEV tty<br />
vzctl exec 101 /sbin/MAKEDEV pty<br />
vzctl exec 101 mknod --mode=666 /dev/ptmx c 5 2<br />
vzctl enter 101<br />
<br />
==== Permanent fix with udev ====<br />
* For a permanent fix with udev, you will need to force udev to make LEGACY_PTYS:<br />
<br />
cat > /etc/udev/makedev.d/51-udev.nodes<br />
# These device have to be created manually<br />
tty0<br />
tty1<br />
tty2<br />
tty3<br />
....<br />
ttyp0<br />
ttyp1<br />
ttyp2<br />
ttyp3<br />
....<br />
ptyp0<br />
ptyp1<br />
ptyp2<br />
ptyp3<br />
....<br />
<br />
==== Permanent fix without udev ====<br />
* Alternatively, you can disable udev:<br />
<br />
Edit the ''/etc/rc.d/rc.sysinit'' file and comment out the ''/sbin/start_udev'' line<br />
<br />
Or you can run the following command:<br />
<br />
sed -i 's|/sbin/start_udev|#/sbin/start_udev|g' /etc/rc.d/rc.sysinit<br />
<br />
''Warning'' Updates to the package which owns this file may revert your changes.<br />
<br />
''Note'' This was tested with CentOS VE.<br />
<br />
=== Debian only ===<br />
<br />
* Enter the VE manually<br />
CTID=101<br />
vzctl exec $CTID "mount -t devpts devpts /dev/pts" <br />
vzctl enter $CTID<br />
<br />
* Remove udev using apt<br />
CTID=101<br />
vzctl exec $CTID apt-get remove udev<br />
vzctl restart $CTID<br />
<br />
=== Older Slackware ===<br />
<br />
Check that /dev/pts is mounted under the container as a devpts filesystem:<br />
<br />
vzctl exec VEID mount<br />
<br />
If it is not, try this immediate fix:<br />
<br />
vzctl exec VEID mount /dev/pts<br />
<br />
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.<br />
<br />
<br />
== See also ==<br />
<br />
* {{Bug|130}}<br />
* {{Bug|578}}<br />
<br />
[[Category: Troubleshooting]]</div>Nataraj