Online troubleshooting commands-Shell, online troubleshooting-shell

1. Track the online log to refresh the latest content regularly
tail-fn 200 $ log
2. Find the specified string
#Show only matching lines
grep $ String $ file
#Match the upper and lower n lines of the string
grep-C n $ String $ file
#How many lines match the string
grep $ String $ file | wc -l
#Match string highlighting
grep --color $ String $ file
#Using regular
grep-E $ String $ file
3. Intercept the call time printed by logman
# Provided by Hisashi
grep $ String service.log | awk-F'class '{print $ 1}'
Zh
# Provided by Yang Mu
grep $ String service.log | awk-F '[()]' {print $ 4} '
4. View service port
netstat-anp | grep java
lsof-i: 8080
5. View some information in the process
ps-ef | java grep
ps aux | java grep
6. View the JVM process
jps
# With jvm parameter information
jps -v
# Show only id
jps -q
#Output parameters of main method
jps -m
#Output complete package name, application main class name, jar full path
jps -l
7. View files
ls
# View all files
ls-a
# List file permissions
ls-al
# Display file size and sort it by time
ll -thr
8. Copy files remotely
# Copy files from remote server to local
scp root @ host: /dir/file.f/home/
# Copy local files to remote server
scp /home/file.f root @ host: / dir /
9. Storage status check
# View
free-m
# memory size
free-m | grep "Mem" | awk '{print $ 2}'
10.View multiple cluster server configurations
# View
polysh 'xxx <01-04> xxx <01>'
11. Observe system process status
# View top information
top
# System uptime and load average
uptime
# Refresh every 5 seconds, with CPU usage data on the far right
vmstat 5
> Https://linux.cn/thread-12037-1-1.html

12. View disk io
# View
iostat
# Basic Information
iostat -d -k 1 10
13. Check disk usage
# View
df-h
14. Find files
# Find
find path -name "* .conf" -print
15. A few more basic commands for entertainment ~
# 看谁 在线.
w
who
#View the login log.
last
#Login logs for all accounts.
lastlog
# increase user
adduser xxx
#change Password:        
sudo passwd xxx
#Shut down
shutdown-h now
#Restart now
shutdown-r now
#Cut off the power and restart (requires root privileges), it is not recommended.
reboot
#Logout command
logout
#View rules
sudo iptables -L
# View Date
date
16.File directory class
# Create directory
mkdir directory name
# Delete empty directory
rmdir directory name
#Unconditionally delete subdirectories (rm command is not recommended, use mv instead)
rm-rf directory name
# Change the current directory
directory name
# View your own directory
pwd
# View the current directory size
du
#Show directory file list
ls-l (-a: increase display of hidden directories) where: blue: directory; green: executable file; red: compressed file; light blue: link file; gray: other file; white text on red background: wrong link file
# Browse documents
more filename.txt
less file name.txt
#Copy file
cp source file destination file (-r: include directory)
17. kill the process
# kill process
kill [parameter] [pid]
HUP 1 Terminal disconnected
INT 2 Interrupt (same as Ctrl + C)
QUIT 3 Exit (same as Ctrl + \)
TERM 15 Termination
KILL 9 Mandatory termination
CONT 18 continue (as opposed to STOP, fg / bg command)
STOP 19 Pause (same as Ctrl + Z)

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Copyright statement: This article is the original article of the CSDN blogger "Allen-X", which follows the CC 4.0 BY-SA copyright agreement.
Original link: https://blog.csdn.net/u010827436/article/details/46564673