Performance monitor and tracing command in Linux
ifconfig
Number of network cards, IP address, MAC address, MTU size
eth0 Link encap:Ethernet HWaddr 00:0d:3a:50:12:e9
inet addr:10.0.0.4 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::20d:3aff:fe50:12e9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:129949 errors:0 dropped:0 overruns:0 frame:0
TX packets:104544 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:93502262 (93.5 MB) TX bytes:17135376 (17.1 MB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:113017627 errors:0 dropped:0 overruns:0 frame:0
TX packets:113017627 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:15337780680 (15.3 GB) TX bytes:15337780680 (15.3 GB)
w
Current user and running programs, 1-minute, 5-minute, 10-minute load average
10:19:04 up 3:34, 2 users, load average: 0.00, 0.02, 0.05
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
ubuntu pts/0 104.210.36.135 10:14 0.00s 0.08s 0.02s sshd: ubuntu [priv]
ubuntu pts/1 104.210.36.135 07:25 2:53m 1:49 0.02s sshd: ubuntu [priv]
df
Disk usage, mount directories, total capacity, usage, etc.
df -h
Filesystem Size Used Avail Use% Mounted on
udev 14G 12K 14G 1% /dev
tmpfs 2.8G 404K 2.8G 1% /run
/dev/sda1 29G 1.8G 26G 7% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 14G 0 14G 0% /run/shm
none 100M 0 100M 0% /run/user
none 64K 0 64K 0% /etc/network/interfaces.dynamic.d
/dev/sdb1 55G 52M 53G 1% /mnt
View inode usage
df -Ti
Filesystem Type Inodes IUsed IFree IUse% Mounted on
udev devtmpfs 3600253 435 3599818 1% /dev
tmpfs tmpfs 3601470 372 3601098 1% /run
/dev/sda1 ext4 1925120 89929 1835191 5% /
none tmpfs 3601470 2 3601468 1% /sys/fs/cgroup
none tmpfs 3601470 1 3601469 1% /run/lock
none tmpfs 3601470 1 3601469 1% /run/shm
none tmpfs 3601470 2 3601468 1% /run/user
none tmpfs 3601470 1 3601469 1% /etc/network/interfaces.dynamic.d
/dev/sdb1 ext4 3670016 12 3670004 1% /mnt
ps
View processes
ps auxfww
pmap
View the memory occupied by the various libraries called by a process
pmap -d PID
Memory usage monitoring
free -h
total used free shared buffers cached
Mem: 27G 1.6G 25G 448K 39M 1.1G
-/+ buffers/cache: 508M 26G
Swap: 0B 0B 0B
View swap I/O
vmstat 1
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
1 0 0 27127940 40624 1122280 0 0 2 29 171 369 1 2 97 0 0
0 0 0 27127644 40624 1122280 0 0 0 0 27 92 0 0 100 0 0
0 0 0 27127768 40624 1122312 0 0 0 0 22 109 0 0 100 0 0
0 0 0 27127768 40624 1122312 0 0 0 0 18 49 0 0 100 0 0
0 0 0 27127800 40624 1122312 0 0 0 0 21 103 0 0 100 0 0
Network-related data view
View TCP, UDP ports and their related programs
netstat -tunlp
netstat -tan
View disk I/O
iostat -x
avg-cpu: %user %nice %system %iowait %steal %idle
1.05 0.00 1.91 0.06 0.00 96.98
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
scd0 0.00 0.00 0.01 0.00 0.02 0.00 7.82 0.00 0.86 0.86 0.00 0.86 0.00
sda 0.00 2.51 0.57 3.85 14.26 223.74 107.62 0.04 10.13 2.82 11.21 1.17 0.52
sdb 0.00 2.36 0.06 0.15 0.40 4196.06 39096.28 0.00 16.67 0.16 23.59 0.21 0.00
dstat
Real-time monitoring and collection of CPU, disk, network, and system performance
You did not select any stats, using -cdngy by default.
----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system--
usr sys idl wai hiq siq| read writ| recv send| in out | int csw
1 1 97 0 0 0| 14k 4206k| 0 0 | 0 0 |1248 2698
0 0 100 0 0 0| 0 0 | 264B 1284B| 0 0 | 20 125
0 0 100 0 0 0| 0 0 | 66B 370B| 0 0 | 24 75
0 0 100 0 0 0| 0 0 | 198B 934B| 0 0 | 20 86
0 0 100 0 0 0| 0 0 | 198B 758B| 0 0 | 22 81
0 0 100 0 0 0| 0 12k| 132B 500B| 0 0 | 20 69
mtr
A tool that integrates ping and traceroute, used to view request and packet loss situations, etc.
mtr -r -c 10 -i 2 www.google.com
Start: Sat Feb 6 10:59:50 2016
HOST: UBUNTU Loss% Snt Last Avg Best Wrst StDev
1.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
2.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
3.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
4.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
5.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
6.|-- 104.44.8.196 0.0% 10 3.5 3.0 1.8 3.7 0.3
7.|-- ae69-0.pao-96cbe-1a.ntwk. 0.0% 10 1.3 1.7 1.2 4.3 0.8
8.|-- 72.14.194.139 0.0% 10 1.2 1.3 1.2 1.8 0.0
9.|-- 209.85.240.114 0.0% 10 1.6 1.6 1.5 1.6 0.0
10.|-- 74.125.37.43 0.0% 10 1.7 1.7 1.7 1.9 0.0
11.|-- nuq04s30-in-f4.1e100.net 0.0% 10 1.6 1.6 1.6 1.7 0.0
iptraf
Real-time status monitoring of network cards
- Network card packet statistics:
iptraf -z eth0 - Real-time bandwidth flow of network card connections to IP:
iptraf -i eth0 - Real-time input/output bandwidth of network card:
iptraf -d eth0 - Real-time statistics of network card connections to port:
iptraf -p eth0
tcpdump
-i ANY ：Listen to the traffic on a particular network interface
-n：Don't resolve hostnames
-nn：Don't resolve hostnames or port names
-X：Print packet contents in both hex and ASCII
-XX：Print packet contents in both hex and ASCII, including Ethernet header information
-v/-vv/-vvv：Increase the verbosity level
-c：Capture a specified number of packets
-s：Capture a specified number of bytes of each packet
-S：Print TCP sequence numbers
-e：Print Ethernet header information
-q：Print less protocol information
-E：Specify a decryption
strace
strace -p PID