newbie14's questions

I have 3 cronjob set to work on reboot. When I reboot only 2 works and the 3rd one does not work. What could be stopping it from working? Where to get the clues? All of it I have redirection for the output done and there is a .log file generated for all 3. But the problematic cron job have empty log file.

EDIT From /var/log/cron

Jul 19 01:06:08 itest CROND[2155]: (root) CMD (/home/test1/PF_RING-5.4.3/userland/examples/packetSecondAnalyis.c -m 2>&1 >> /var/log/myPacketeSecondAnalyis.log)

Jul 19 01:06:08 itest CROND[2154]: (root) CMD (/home/test1/PF_RING-5.4.3/userland/examples/pfExeV3.c -m 2>&1 >> /var/log/myPacketCapture.log)

Jul 19 01:06:08 itest CROND[2156]: (root) CMD (/home/test1/PF_RING-5.4.3/userland/examples/pAR.c -m 2>&1 >> /var/log/myPAR.log)

Issue now is crond[2156] is not running. I have checked using top command also not there?

I have a machine running a very small java listener and no body is using this machine but load is like staying between 0.9 to 0.6 for nearly sometime? IS it any indication here? What could be causing to go high when there is very little activity on the server? I saw a lot of events/3,hald-addon-stor,init,kthreadd, miniserv.pl etc running what are there?

top - 21:43:46 up 1 day,  7:50,  1 user,  load average: 0.92, 0.40, 0.20
Tasks: 251 total,   1 running, 249 sleeping,   0 stopped,   1 zombie
Cpu(s):  0.1%us,  0.0%sy,  0.0%ni, 99.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   7992392k total,  5426492k used,  2565900k free,   203156k buffers
Swap:  6094840k total,        0k used,  6094840k free,  4605780k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  434 root      20   0     0    0    0 S  0.3  0.0   0:29.63 scsi_eh_4
 6168 root      20   0 20204 1248 1068 S  0.3  0.0   0:33.11 hald-addon-stor
 9021 root      20   0 15152 1348  932 R  0.3  0.0   0:01.33 top
 9162 root      20   0     0    0    0 Z  0.3  0.0   0:00.04 miniserv. <defunct>
    1 root      20   0 19332 1528 1220 S  0.0  0.0   0:01.33 init
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.02 kthreadd
    3 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/0
    4 root      20   0     0    0    0 S  0.0  0.0   0:00.25 ksoftirqd/0
    5 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/0
    6 root      RT   0     0    0    0 S  0.0  0.0   0:00.08 watchdog/0
    7 root      RT   0     0    0    0 S  0.0  0.0   0:00.09 migration/1
    8 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/1
    9 root      20   0     0    0    0 S  0.0  0.0   0:00.21 ksoftirqd/1
   10 root      RT   0     0    0    0 S  0.0  0.0   0:00.08 watchdog/1
   11 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/2
   12 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/2

cpu info (I am having 8 cpus)

processor   : 7
vendor_id   : GenuineIntel
cpu family  : 6
model       : 44
model name  : Intel(R) Xeon(R) CPU           E5640  @ 2.67GHz
stepping    : 2
cpu MHz     : 1596.000
cache size  : 12288 KB
physical id : 0
siblings    : 8
core id     : 10
cpu cores   : 4
apicid      : 21
initial apicid  : 21
fpu     : yes
fpu_exception   : yes
cpuid level : 11
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt aes lahf_lm ida arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips    : 5333.16
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:

I have a brand new centos 6.2 server. The first thing I did is yum -y install aide and then next I did aide --init. Below is a whole lot of errors I got.What does it means must I reinstall it? Or leave it ?

/usr/sbin/prelink: /usr/sbin/lusermod: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/console-kit-daemon: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/NetworkManager: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/rtacct: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/tcpdump: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/dnsmasq: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/getsebool: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/ownership: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/modem-manager: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/pluginviewer: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/sasl2-shared-mechlist: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/ifdhandler: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/mklost+found: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/vpddecode: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/skdump: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/getpcaps: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/lpasswd: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/tmpwatch: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/ck-log-system-stop: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/alternatives: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/avahi-daemon: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/dump-acct: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/luseradd: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/nstat: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/efibootmgr: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/sasldblistusers2: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/e2freefrag: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/sa: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/lgroupadd: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/ss: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/dmidecode: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/sktest: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/fdformat: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/saslpasswd2: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/selinuxenabled: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/pppstats: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/wpa_supplicant: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/capsh: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/togglesebool: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/kppp: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/lgroupmod: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/cracklib-unpacker: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/getcap: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/avcstat: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/lnstat: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/filefrag: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/lid: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/bonobo-activation-sysconf: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/lockdev: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/mcelog: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/cifs.upcall: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/pcscd: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/brctl: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/logrotate: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/wpa_passphrase: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/pppdump: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/lsof: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/ck-log-system-start: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/setcap: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/rtkitctl: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/latencytop: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/wpa_cli: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process
/usr/sbin/prelink: /usr/sbin/saned: at least one of file's dependencies has changed since prelinking
Error on exit of prelink child process

I have setup a test machine and tried to ssh from externally I get connection refused. But when I try from a local machine and local address it works well but if I try global ip it fails. I have port forwarded 22 to the machine. Any more steps I am missing? I have done this too netstat -ntlp and I can see the port 22 with sshd service.

Iptables details

kts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     udp  --  virbr0 *       0.0.0.0/0            0.0.0.0/0           udp dpt:53 
    0     0 ACCEPT     tcp  --  virbr0 *       0.0.0.0/0            0.0.0.0/0           tcp dpt:53 
    0     0 ACCEPT     udp  --  virbr0 *       0.0.0.0/0            0.0.0.0/0           udp dpt:67 
    0     0 ACCEPT     tcp  --  virbr0 *       0.0.0.0/0            0.0.0.0/0           tcp dpt:67 
    4   160 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
    0     0 ACCEPT     icmp --  *      *       0.0.0.0/0            0.0.0.0/0           
    4   240 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0           
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22 
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:9000 
   23  3671 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     all  --  *      virbr0  0.0.0.0/0            192.168.122.0/24    state RELATED,ESTABLISHED 
    0     0 ACCEPT     all  --  virbr0 *       192.168.122.0/24     0.0.0.0/0           
    0     0 ACCEPT     all  --  virbr0 virbr0  0.0.0.0/0            0.0.0.0/0           
    0     0 REJECT     all  --  *      virbr0  0.0.0.0/0            0.0.0.0/0           reject-with icmp-port-unreachable 
    0     0 REJECT     all  --  virbr0 *       0.0.0.0/0            0.0.0.0/0           reject-with icmp-port-unreachable 
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-is-bridged 
    0     0 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Netstat-tulpn results


Chain OUTPUT (policy ACCEPT 28 packets, 3991 bytes)
pkts bytes target     prot opt in     out     source               destination

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1593/sshd           
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      1468/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      1671/master         
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      1349/rpcbind        
tcp        0      0 0.0.0.0:52084               0.0.0.0:*                   LISTEN      1413/rpc.statd      
tcp        0      0 192.168.122.1:53            0.0.0.0:*                   LISTEN      1862/dnsmasq        
tcp        0      0 :::22                       :::*                        LISTEN      1593/sshd           
tcp        0      0 ::1:631                     :::*                        LISTEN      1468/cupsd          
tcp        0      0 :::36952                    :::*                        LISTEN      1413/rpc.statd      
tcp        0      0 :::111                      :::*                        LISTEN      1349/rpcbind        
tcp        0      0 :::80                       :::*                        LISTEN      1694/httpd          
udp        0      0 0.0.0.0:741                 0.0.0.0:*                               1413/rpc.statd      
udp        0      0 0.0.0.0:5353                0.0.0.0:*                               1395/avahi-daemon:  
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               1349/rpcbind        
udp        0      0 0.0.0.0:631                 0.0.0.0:*                               1468/cupsd          
udp        0      0 0.0.0.0:53019               0.0.0.0:*                               1395/avahi-daemon:  
udp        0      0 0.0.0.0:676                 0.0.0.0:*                               1349/rpcbind        
udp        0      0 192.168.122.1:53            0.0.0.0:*                               1862/dnsmasq        
udp        0      0 0.0.0.0:33975               0.0.0.0:*                               1413/rpc.statd      
udp        0      0 0.0.0.0:67                  0.0.0.0:*                               1862/dnsmasq        
udp        0      0 :::44763                    :::*                                    1413/rpc.statd      
udp        0      0 :::111                      :::*                                    1349/rpcbind        
udp        0      0 :::676                      :::*                                    1349/rpcbind        

 pkts bytes target     prot opt in     out     source               destination