[root@wen ~]# w 19:01:27 up 1 day, 7:06, 3 users, load average: 0.00, 0.00, 0.00 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT root tty1 - Sun06 36:30m 0.00s 0.00s -bash root pts/0 192.168.13.1 14:00 2:39m 0.45s 0.45s -bash root pts/1 192.168.13.1 19:01 0.00s 0.00s 0.00s w [root@wen ~]# uptime 19:01:38 up 1 day, 7:06, 3 users, load average: 0.00, 0.00, 0.00
查看ip ifconfig ip addr ----- man ip 查看更多 查看磁盘使用情况 [root@wen ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 8.6G 2.3G 5.9G 29% / tmpfs 491M 0 491M 0% /dev/shm /dev/sda1 190M 36M 145M 20% /boot 查看inode使用情况 [root@wen ~]# df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda2 577088 81403 495685 15% / tmpfs 125596 1 125595 1% /dev/shm /dev/sda1 51200 38 51162 1% /boot 查看当前系统内存的使用情况 [root@wen ~]# free -m total used free shared buffers cached Mem: 981 232 748 0 69 62 -/+ buffers/cache: 100 880 Swap: 1023 0 1023
[root@wen ~]# netstat -lntpu|grep 22 tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1540/sshd tcp 0 0 :::22 :::* LISTEN 1540/sshd [root@wen ~]# ss -tunlp|grep 22 tcp LISTEN 0 128 :::22 :::* users:(("sshd",1540,4)) tcp LISTEN 0 128 *:22 *:* users:(("sshd",1540,3)) [root@wen test]# lsof -i :22 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME sshd 1540 root 3u IPv4 11157 0t0 TCP *:ssh (LISTEN) sshd 1540 root 4u IPv6 11159 0t0 TCP *:ssh (LISTEN) sshd 7296 root 3r IPv4 24132 0t0 TCP bogon:ssh->bogon:64386 (ESTABLISHED) sshd 8060 root 3r IPv4 25604 0t0 TCP bogon:ssh->bogon:54262 (ESTABLISHED) sshd 8167 root 3r IPv4 26440 0t0 TCP bogon:ssh->bogon:54599 (ESTABLISHED) [root@wen test]# lsof -i tcp:22 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME sshd 1540 root 3u IPv4 11157 0t0 TCP *:ssh (LISTEN) sshd 1540 root 4u IPv6 11159 0t0 TCP *:ssh (LISTEN) sshd 7296 root 3r IPv4 24132 0t0 TCP 192.168.13.128:ssh->bogon:64386 (ESTABLISHED) sshd 8060 root 3r IPv4 25604 0t0 TCP 192.168.13.128:ssh->bogon:54262 (ESTABLISHED) sshd 8167 root 3r IPv4 26440 0t0 TCP 192.168.13.128:ssh->bogon:54599 (ESTABLISHED)
查看文本 [root@wen ~]# sed -n '1,3p' /etc/passwd root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin [root@wen ~]# awk 'NR<4{print $0}' /etc/passwd root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin 将/home/tong/test目录下大于100k的文件移到/tmp目录 [root@wen ~]# cd /home/tong/test [root@wen test]# dd if=/dev/zero of=oldboy bs=1K count=111 记录了111+0 的读入 记录了111+0 的写出 113664字节(114 kB)已复制，0.000403373 秒，282 MB/秒 [root@wen test]# ls oldboy [root@wen test]# find . -type f -size +100k|xargs -i mv {} /tmp/ [root@wen test]# ls /tmp/ ps - report a snapshot of the current processes. [root@wen test]# ps aux|grep 8338 root 8363 0.0 0.0 103320 860 pts/1 S+ 19:52 0:00 grep --color=auto 8338 网卡配置文件，最后的网卡序号可能会变 [root@wen test]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 TYPE=Ethernet ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=dhcp USERCTL=no IPV6INIT=no HWADDR=00:0c:29:e9:95:dd DNS2=8.8.8.8 DNS1=192.168.59.2 PEERDNS=yes 查看DNS，网卡也可以配置DNS（最先生效），最终也会解析下面的DNS文件 [root@wen test]# cat /etc/resolv.conf ; generated by /sbin/dhclient-script search localdomain nameserver 192.168.13.2
真正查看网卡
[root@wen test]# ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: off (auto)
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
查看二进制文件
[root@wen test]# od /bin/ls统计/var/log/下的文件数 [root@wen test]# find /var/log -type f|wc -l 77 [root@wen test]# find /var/log -maxdepth 1 -type f|wc -l 42