5

I have an AIX server which suddenly stopped servicing SSH connections. When I try to start the service through startsrc -s sshd it says:

0513-059 The sshd Subsystem has been started. Subsystem PID is 258300.

However, right after issuing the command, the services status shows up as inoperative:

 sshd             ssh                           inoperative

The init scripts are well located and throw the same result as above.

EDIT: Here's the odmget command output:

SRCsubsys:
    subsysname = "sshd"
    synonym = ""
    cmdargs = "-D"
    path = "/usr/sbin/sshd"
    uid = 0
    auditid = 0
    standin = "/dev/console"
    standout = "/dev/console"
    standerr = "/dev/console"
    action = 1
    multi = 0
    contact = 2
    svrkey = 0
    svrmtype = 0
    priority = 20
    signorm = 15
    sigforce = 9
    display = 1
    waittime = 20
    grpname = "ssh"

When trying to start the service manually, the following error appears:

exec(): 0509-036 Cannot load program /usr/sbin/sshd because of the following errors:
0509-150   Dependent module libz.a(libz.so.1) could not be loaded.
0509-022 Cannot load module libz.a(libz.so.1).
0509-026 System error: A file or directory in the path name does not exist.

Any help would be greatly appreciated.

2

You can try the following:

1) enable LogLevel DEBUG3 in /etc/ssh/sshd_config

2) add string security.debug /var/log/syslog.security.debug rotate time 1d files 4 to /etc/syslog.conf

3) then

# touch /var/log/syslog.security.debug
# stopsrc -s syslogd
# startsrc -s syslogd
# stopsrc -s sshd
# startsrc -s sshd
9
  • I tried changing what you said, but It didn't shows any useful logging information. I check the log file after restarting syslog and ssh services but there's no information there. Jan 8 '13 at 19:57
  • Is /var/log/syslog.security.debug empty? Does ps -elf | grep ssh get something? What errpt says?
    – dchirikov
    Jan 8 '13 at 20:00
  • As a matter of fact, the file is empty. errpt does not show any sshd-related entries and ps -elf does not show the process running. Thank you. Jan 8 '13 at 21:25
  • 1
    Does /var/adm/ras/syslog.caa contain some clues? If it doesnt exist touch this file and try to restart sshd.
    – dchirikov
    Jan 8 '13 at 21:27
  • Please provide odmget -q subsysname=sshd SRCsubsys
    – dchirikov
    Jan 8 '13 at 21:33
0

Looks like libz.so.1 is missing on your system.

1
  • Yes, it is. I will restore it to its location to see if it works. Jan 11 '13 at 20:21

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.