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oracle virtualbox修改虚拟机的default machine folder:cd /root/.VirtualBox/cp VirtualBox.xml VirtualBox.xml_bakvi VirtualBox.xml修改虚拟机对应名称的项，后保存退出

用for 读取服务器列表，空格间隔for h in `cat a`; do ssh root@${h} 'chkconfig --level 35 ntpd on && chkconfig --list ntpd && service ntpd status && ntpq -n -p' ;done#以下命令每读取一行IP地址，如果不执行ssh命令while正常运行,如果执行的是ssh命令，则只有第一个IP地址成功完成ssh命令cat a | while read ip ; do command ;done[@more@]

nc -z -v -w 2 -n 10.20.22.37 1-50000 2>/dev/null [@more@]

用过host做网关，用iptables做IP隐藏iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o bond0 -j MASQUERADELink URL: http://wangzhensheng.itpub.net/post/28229/529957

systool -c fc_host -vport name 或者node name 就是该hba卡的 wwnsystool -c fc_host -v | grep port_namesystool -c fc_transport -vportname 或者node name 是target 端的 wwncat /var/log/messages |grep iscsi|...

sed -i "231s:.*:hello:g" file #将第231行的所有字符替换为hellosed -i '$d' file #将文件file的最后一行删除sed -i "/# hardware ethernet/a${c}" filename # 模式匹配行后匹配行下增加一行，也就是模式匹配后匹配...

nc扫描端口udpnc -z -v -n 10.1.1.100 9990-10000 2>/dev/null tcpnc -z -v -u -n 10.1.1.100 120-125 2>/dev/null Link URL: http://wangzhensheng.itpub.net/post/28229/525646

vi /etc/security/limits.conf* - nofile 40000USERNAME soft nofile 50000USERNAME hard nofile 60000vi /etc/ssh/sshd_config#UseLogin no改成UseLogin yesservice sshd restart用rootulimit -HSn 40000vi /etc/se...

挂在openfiler的iscsi硬盘/etc/init.d/iscsi start/etc/init.d/iscsid startip='192.168.65.80'; ip='10.10.10.80'; iscsiadm --mode discovery --type sendtargets --portal $ip# mount iscsiadm -m node -p $ip -T...

挂载openfilerip='192.168.65.80'; iscsiadm -m node -p $ip -T `iscsiadm --mode discovery --type sendtargets --portal $ip | awk '{print $2}'` -uiscsiadm --mode discovery --type sendtargets --portal $ipis...

vsftpd服务器端登录后，执行ls不能看到文件列表，原因selinux启动以下命令用以不重启服务器 关闭selinuxsestatus -vfind /etc/sysconfig/* -name 'selinux' | xargs perl -pi -e 's|^SELINUX=enforcing|SELINUX=disa...

在执行oracle 10g rac (10201)的第二个节点上执行root.sh脚本是会出现报错$ORA_CRS_HOME/jdk/jre/bin/java: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file...

批量修改密码做好root口令的信任#!/bin/bashcat pa_user | while read a;do echo $a | awk -F: '{print $1,$2,$3}'| while read host user pass; do echo "passwd $host" ssh $host "echo $pass| passwd --stdin $us...

rpm -ivh hp-ilo-8.2.5-22.rhel5.x86_64.rpmrpm -ivh hponcfg-1.9.0-3.noarch.rpmrpm -ivh hp-health-8.2.5-50.rhel5.x86_64.rpminsmod /opt/hp/hp-ilo/bin/2.6.18-92.el5/hpilo.ko 2>/tmp/hptesthponcfg -w ilo.xml编辑ilo.xml文件将 <ADD_USER USER_NAME = "root" USER_LOGIN = "root" PASSWORD = "%user_password%"> <ADMIN_PRIV value = "Y"/> <REMOTE_CONS_PRIV value = "Y"/> <RESET_SERVER_PRIV value = "Y"/> &lt

rz /etc/dhcpd.conf ## DHCP Server Configuration file.# see /usr/share/doc/dhcp*/dhcpd.conf.sample #ddns-update-style interim;ignore client-updates;allow booting;allow bootp;subnet 192.168.65.0 netmask 255.255.255.0 { option routers 192.168.65.1; option subnet-mask 255.255.255.0; option time-offset -18000; #option domain-name-servers 210.73.88.240; range dynamic-bootp 192.168.65.80 192.168.65.100; default-lease-time 21600; max-lease-time 43200; #deny unknown-clients;

tcpdump -p -n -vvv -ttt -s 0 -X dst host xxx.xxx.xxx.xxx and port 8001 and tcp -p 关闭混杂模式-n不解析主机-s 不限制包的大小 -X 显示包中16进制文件的ASCII码[@more@]lij

perl -le '@a=stat(qq(./b))for (0..12){print $a[$i],"n";}'8,最后访问时间9,最后修改时间10,最后修改时间perl -le 'use POSIX;;@a=stat(qq(file_name));print (strftime("%Y-%m-%d_%H-%M-%S",localtime($a[10])));'[@more@]

a=`perl -le 'use POSIX;;print (strftime("%Y-%m-%d_%H-%M-%S",localtime(time()-2*86400)));'`;echo $a[@more@]

time nc -nzv 127.0.0.1 1-65535 2>/dev/nulltime nmap -p 1-65535 127.0.0.1看看哪个速度快[@more@]

n="1048477";while [ : ] ; do if ulimit -Hn $n >/dev/null 2>&1 ; then echo "${n} :`ulimit -Hn`" ; else echo "${n} :ulimit -Hn max ..."; break ; fi; n=`expr $n + 1` ; ulimit -Hn 60000;done[@more@]