全面了解Linux服务器
1、查看Linux服务器的CPU详细情况
total used free shared buffers cached
Mem: 4007 3777 230 0 84 2089
-/+ buffers/cache: 1603 2403
Swap: 4479 0 4479
total:内存总数:4007MB
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 60801 488279610 8e Linux LVM
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
447G 142G 283G 34% /
/dev/sda1 99M 12M 82M 13% /boot
tmpfs 2.0G 0 2.0G 0% /dev/shm
Linux 2.6.18-194.el5PAE (mail.xa.com) 02/21/2013
sda 2.79 11.71 5.09 5.53 581.41 70.39 122.74 0.11 10.51 1.79 1.90
sda1 0.00 0.00 0.00 0.00 0.00 0.00 25.80 0.00 5.18 4.96 0.00
sda2 2.78 11.71 5.09 5.53 581.41 70.39 122.74 0.11 10.51 1.79 1.90
dm-0 0.00 0.00 7.88 17.24 581.41 70.38 51.90 0.24 9.64 0.76 1.90
dm-1 0.00 0.00 0.00 0.00 0.00 0.00 8.00 0.00 11.40 1.76 0.00
7.0M /boot
65536+0 records in
65536+0 records out
67108864 bytes (67 MB) copied, 0.333573 seconds, 201 MB/s
8581492+0 records in
8581492+0 records out
4393723904 bytes (4.4 GB) copied, 219.917 seconds, 20.0 MB/
18:31:35 up 1:29, 1 user, load average: 0.08, 0.30, 0.67
18:33:21 up 1:31, 1 user, load average: 0.01, 0.21, 0.60
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 192.168.47.1 17:09 0.00s 0.18s 0.03s w
top - 18:34:55 up 1:32, 1 user, load average: 0.00, 0.15, 0.53
Tasks: 80 total, 2 running, 78 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1025740k total, 613500k used, 412240k free, 2400k buffers
Swap: 2064376k total, 140k used, 2064236k free, 456752k cached
1 root 18 0 10348 636 536 S 0.0 0.1 0:00.78 init
2 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root 10 -5 0 0 0 S 0.0 0.0 0:02.50 events/0
5 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 khelper
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 140 411808 2544 456776 0 0 808 796 1023 130 2 5 90 2 0
1 0 140 411808 2544 456776 0 0 0 0 1009 48 0 0 100 0 0
0 0 140 411808 2544 456776 0 0 0 0 1004 36 0 0 100 0 0
1 0 140 411808 2544 456776 0 0 0 0 1010 45 0 1 99 0 0
Linux mail 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:14 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
2.6.18-194.el5
drwxr-xr-x 2 root root 4096 Feb 21 18:14 bin/
drwxr-xr-x 4 root root 1024 Feb 21 16:57 boot/
drwxr-xr-x 13 root root 4260 Feb 21 17:04 dev/
drwxr-xr-x 91 root root 12288 Feb 21 18:14 etc/
drwxr-xr-x 2 root root 4096 Jan 27 2010 home/
drwxr-xr-x 11 root root 4096 Feb 21 18:13 lib/
drwxr-xr-x 7 root root 12288 Feb 21 18:14 lib64/
drwx------ 2 root root 16384 Feb 21 16:49 lost+found/
drwxr-xr-x 2 root root 4096 Jan 27 2010 media/
drwxr-xr-x 2 root root 0 Feb 21 17:03 misc/
drwxr-xr-x 2 root root 4096 Jan 27 2010 mnt/
drwxr-xr-x 2 root root 0 Feb 21 17:03 net/
drwxr-xr-x 2 root root 4096 Jan 27 2010 opt/
dr-xr-xr-x 96 root root 0 Feb 21 17:02 proc/
drwxr-x--- 4 root root 4096 Feb 21 18:16 root/
drwxr-xr-x 2 root root 12288 Feb 21 18:14 sbin/
drwxr-xr-x 4 root root 0 Feb 21 17:02 selinux/
drwxr-xr-x 2 root root 4096 Jan 27 2010 srv/
drwxr-xr-x 11 root root 0 Feb 21 17:02 sys/
drwxrwxrwt 4 root root 4096 Feb 21 18:19 tmp/
drwxr-xr-x 15 root root 4096 Feb 21 16:52 usr/
drwxr-xr-x 21 root root 4096 Feb 21 16:54 var/
/sbin/init: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped
LSB Version: :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: CentOS
Description: CentOS release 5.5 (Final)
Release: 5.5
Codename: Final
02:01.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet Controller (Copper) (rev 01)
NETWORKING_IPV6=no
HOSTNAME=localhost.localdomain
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
; generated by /sbin/dhclient-script
search localdomain
nameserver 192.168.1.253
eth0 Link encap:Ethernet HWaddr 00:0C:29:5E:4E:6A
inet addr:192.168.47.132 Bcast:192.168.47.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe5e:4e6a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8944 errors:0 dropped:0 overruns:0 frame:0
TX packets:9763 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3463081 (3.3 MiB) TX bytes:1080899 (1.0 MiB)
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:33 errors:0 dropped:0 overruns:0 frame:0
TX packets:33 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3730 (3.6 KiB) TX bytes:3730 (3.6 KiB)
eth0 Link encap:Ethernet HWaddr 00:0C:29:5E:4E:6A
inet addr:192.168.47.132 Bcast:192.168.47.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe5e:4e6a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9206 errors:0 dropped:0 overruns:0 frame:0
TX packets:10608 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3481993 (3.3 MiB) TX bytes:1172281 (1.1 MiB)
192.168.1.8
PING caelum.sina.com.cn (218.30.66.101) 56(84) bytes of data.
64 bytes from 218.30.66.101: icmp_seq=1 ttl=128 time=16.8 ms
64 bytes from 218.30.66.101: icmp_seq=2 ttl=128 time=20.4 ms
64 bytes from 218.30.66.101: icmp_seq=3 ttl=128 time=18.8 ms
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 16.832/18.735/20.485/1.499 ms
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:2208 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:804 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:2207 0.0.0.0:* LISTEN
tcp 0 0 :::22 :::* LISTEN
tcp 0 52 ::ffff:192.168.47.132:22 ::ffff:192.168.47.1:56646 ESTABLISHED
udp 0 0 0.0.0.0:58904 0.0.0.0:*
udp 0 0 0.0.0.0:798 0.0.0.0:*
udp 0 0 0.0.0.0:801 0.0.0.0:*
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 0.0.0.0:111 0.0.0.0:*
udp 0 0 0.0.0.0:631 0.0.0.0:*
udp 0 0 :::5353 :::*
udp 0 0 :::44923
LISTEN 39
ESTABLISHED 38
TIME_WAIT 15
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.1.2.0 192.168.1.222 255.255.255.0 UG 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
10.1.2.0 192.168.1.222 255.255.255.0 UG 0 0 0 eth0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
traceroute to www.sina.com (218.30.66.102), 30 hops max, 40 byte packets
1 192.168.1.1 (192.168.1.1) 0.266 ms 0.241 ms 0.221 ms
2 192.168.10.249 (192.168.10.249) 1.262 ms 1.252 ms 1.234 ms
3 36.40.164.1 (36.40.164.1) 107.335 ms 107.929 ms 111.038 ms
4 117.39.10.65 (117.39.10.65) 111.023 ms 111.540 ms 112.052 ms
5 10.224.23.1 (10.224.23.1) 35.151 ms 40.092 ms 39.751 ms
6 10.224.211.1 (10.224.211.1) 111.624 ms 114.382 ms 114.854 ms
7 172.16.4.2 (172.16.4.2) 114.329 ms 100.330 ms 94.122 ms
8 192.168.66.18 (192.168.66.18) 96.183 ms 99.321 ms 102.535 ms
9 218.30.66.102 (218.30.66.102) 105.767 ms 105.748 ms 109.291 ms
> mail.163.com
Server: 192.168.1.252
Address: 192.168.1.252#53
mail.163.com canonical name = mcache.mail.163.com.
mcache.mail.163.com canonical name = email.163.com.lxdns.com.
email.163.com.lxdns.com canonical name = public.mail126.001.cnccdn.com.
public.mail126.001.cnccdn.com canonical name = mail163.xdwscache.glb0.lxdns.com.
Name: mail163.xdwscache.glb0.lxdns.com
Address: 119.84.113.55
Directory: /root Shell: /bin/bash
On since Thu Feb 21 13:56 (CST) on pts/0 from 192.168.1.8
Mail last read Wed Jan 9 11:39 2013 (CST)
No Plan.
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
sshd 2824 root 3u IPv6 7329 TCP *:ssh (LISTEN)
sshd 27727 root 3u IPv6 5833810 TCP mail.xa.cdtis.com:ssh->192.168.1.8:61804 (ESTABLISHED)
3059
7198
7207
7208
7209
7210
8.4、kill命令终止一个进程。
172.16.10.0/24 via 192.168.47.2