Use ldd(1) to determine which libraries this program is trying to link against and which ones are missing or can't be linked against, eg. ldd /bin/cat.
In Linux, one possible reason for this is that the SharedLibrary is not in /usr/lib or one of the other directories which are searched for shared libraries. In that case, add the directory to /etc/ld.so.conf and run ldconfig(8). (Other ways of dealing with this are creating a SymLink in /usr/lib to the current location of a library or moving the library to /usr/lib (this is not advisable).)
If it is a dynamic BinaryExecutable, it is possibly linked against a library that doesn't exist, or against a specific SharedLibrary on your system that has the same name but contains different symbols as on the machine that the file was compiled on.
This is particularly annoying as you can also get this message when trying to use ldd(1) to find out which dynamic library is causing the problem. Eg.:'''
$ ./ninfo zsh: no such file or directory: ./ninfo $ file ninfo ninfo: ELF 32-bit LSB executable, Intel 80386, version 1, dynamically linked (uses shared libs), not stripped $ ldd ./ninfo /usr/bin/ldd: ./ninfo: No such file or directory
This makes diagnosis a bit harder! However, you can try:
$ /lib/ld-linux.so.2 --verify --list ./ninfo /usr/local/bin/ninfo: error while loading shared libraries: libc.so.5: cannot open shared object file: No such file or directory
$ strings ./ninfo | grep \.so /lib/ld-linux.so.1 libtermcap.so.2 libc.so.5
If the executable is some kind of script, it might point to an interpreter that doesn't exist on your system. For example, Perl scripts often started with #!/usr/local/bin/perl when you had perl installed as /bin/perl or /usr/bin/perl.
Another possibility is that the script was edited on MicrosoftWindows, or another editor that added Windows style line endings (Carriage Return + Linefeed). Try using dos2unix or tr -d '\r' to go back to Unix style line endings (Linefeed only).
The user running the command is different to the user that started the XServer, or is otherwise not allowed by the XServer to create new (graphical) windows. See XFree86Notes on giving other users permission to open graphical windows on your XServer.
If /proc is mounted, your interfaces are correctly configured, and /etc/protocols is fine, check /etc/nsswitch.conf. It might be declaring other sources than /etc/protocols as authoritative:
protocols: ldap [NOTFOUND=return] files
Here you could allow /etc/protocols as a fallback:
protocols: ldap files
Or delete every other source all together:
PING 192.168.66.10 (192.168.66.10): 56 data bytes ping: sendto: Operation not permitted ping: wrote 192.168.66.10 64 chars, ret=-1
The interface you are pinging out of (192.168.66.10) is firewalled. Fix your FireWall.
Your shell hangs and even ignores Ctrl-C. You have to close the terminal to remove the process.
Possible answer: you have inadvertently typed the special stop flow control character used by terminals. By default, this is Ctrl-S, with Ctrl-Q sending a start character. This is particularly common if you were pressing Ctrl-D or Ctrl-A or a nearby key on a QWERTY keyboard.
You can use the stty(1) program to change this behaviour. stty -ixon will tell your terminal not to use XON/XOFF flow control. You could also say stty stop '' to specify that no character sends a stop character. If you want to play a practical joke on someone you could issue stty stop ' ', which will tell the terminal to stop every time they hit space. To restore the default, you can use stty stop ^s (the circumflex is a common way to spell “Ctrl-” on Unix). Redefining the stop key has the added advantage that you can then use Ctrl-S to search your command history in bash(1)/zsh(1) as well as Ctrl-R for reverse search.
Symptom: xscreensaver(1) gives this message when trying to run one of the 3D screensavers, even though you can run it fine from the command line (such as $/usr/lib/xscreensaver/bubble3d). Or perhaps it works fine when run in a window, but not fullscreen.
20502 john 16 10 139m 8096 2632 S 1.9 3.2 0:00.22 sierpinski3d
This OpenGL application has 139MB of addressable space in use, but it is not using that much virtual memory. Edit ~/.xscreensaver and edit the line that says
to either something much bigger, or set it to 0 (for no limit).
You might see this error message if you use GNOME – it appears quite regularly in my ~/.xsession-errors file.
It is "mostly harmless," seems to occur most frequently when activating menus, and appears to be caused by libsvg/libarts. It implies a minor problem with one of the SVG icons.
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