search for: chulmin2

Hello, all. I would like to use ntpd for time sync not rdate or ntpdate. but after installation the ntpd, I found that listened at all interfaces like below. udp 0 0 192.168.111.2:123 0.0.0.0:* 11528/ntpd udp 0 0 xxx.xxx.62.20:123 0.0.0.0:* 11528/ntpd udp 0 0

Hello, all. I know the function of the swap and can make swap partion or file. But, if there is no swap partion at system, what would be happen? that makes the system unstable or not? I have one system that has no swap, but there was no problem until now. Thanks in advance. _________________________________________________________________ ???? ????! ??? ??? ???? ????! ???

Hello, all. My systems are centos 4.x or 5.x(i386 and x86_64) and various services(apache, mysql, java, sendmail... etc..). and I would like to set auto update using yum. But some staffs didn't agree my auto update plan, because some services can be effected by auto update. There were no side effects just yum updating until now, and it seems impossible for me to check

Hello, all. I want to ask some about ntpd. I set 'server' directive like below at ntp.conf server 0.centos.pool.ntp.org For example, I can see the ntpq result like below. remote refid st t when poll reach delay offset jitter ============================================================================== * 10.10.23.44 211.115.xx.xx 3 u 62 64

Hello, all. I have operated centos 4.x and 5.x system. for 4.x system, I auto update using yum and for 5.x system, using yum-cron. but I can't find any yum-cron package (i386) like below. # yum search yum-cron(at i686, centox 5.3) Warning: No matches found for: yum-cron No Matches found # yum search yum-cron(at x86_64, centos 5.3)

hello all. My system is centos 5.x and there is no module related auditd there is no process(daemon) related auditd and selinux definately disabled. But I can see lots of auditd messages like below. Oct 20 02:01:01 linux kernel: type=1106 audit(1224435661.064:65210): user pid=25860 uid=0 auid=0 msg='PAM: session close acct="root" : exe="/usr/sbin/crond" (hostname=?,

Hello, all. I have deleted some files for mistake. So I would like to re-install those files using yum install. But if I execute yum install some_package, that doesn't work, because some files are remain, I guess. So is there any yum install option to re-install forcely when some files are deleted? Should I remove all related files first to re-install using yum? Thanks in advance.

Hello, all. My system is centos 5.x and I would like to set IP based (acl) accessl-list at snmp verison 3. As I know, at snmp v1/v2c, we can set acl like below. ------ snmpd.conf -------- rocommunity public 127.0.0.1 rocommunity public 10.0.0.1/24 rouser testuser createUser testuser MD5 "passwords" DES --------------------------------------------------- But, how about snmp

Hello, all. I read this document about iptables recent module. http://blog.andrew.net.au/2005/02/16#ipt_recent_and_ssh_attacks and I would like to filter the excessive spam mail sending ip address by iptables recent module. and some questions. iptables -A INPUT -p tcp --dport 25 -m state --state NEW -m recent --set --name SPAM iptables -A INPUT -p tcp --dport 25 -m state --state NEW -m

Hello, all. I found that so many unnessary queue files are saved at /var/spool/clientmqueue/ directory. I tested two way to delete these files. 1. # rm -rf /var/spool/clientmqueue/* 2. # cd /var/spool/clientmqueue/ ; find . | xargs rm -fv But this makes a few load of the system and took too much time to delete. What is the best way to delete fast without too much load?

Hello, all. I'm a begineer for rsync and please help me. I would like to sync data between two ftp sevrer. If one change/add/delete data usingf ftp, other ftp server should sync from the main ftp servert. In my thought, full data directory syncing is too slow, so if the client uses " --files-from" option, sync speed more fast than full data directory syncing. file list is

Hello, all. When I execute arp -a -n, there are lots of arp caches like below. Surely, I set netmask and Broadcast without problem and routing table also no problem. System is CentOS release 4.7 i386. I know how to delete the arp cache, but I don't know why .. # ifconfig eth0 Link encap:Ethernet HWaddr 00:A0:D1:E7:91:CC inet addr:192.168.195.36