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This article introduces the relevant knowledge of "the summary of commands for viewing logs in the Linux system". In the operation of actual cases, many people will encounter this dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Log file description

/ var/log/message system information and error log after startup is one of the most commonly used logs in Red Hat Linux

/ var/log/secure security-related log information

/ var/log/maillog Mail-related log information

/ var/log/cron log information related to scheduled tasks

/ var/log/spooler log information related to UUCP and news devices

Log messages related to / var/log/boot.log daemon start and stop

System

# uname-a # View kernel / operating system / CPU information

# cat / etc/issue

# cat / etc/redhat-release # View operating system version

# cat / proc/cpuinfo # View CPU information

# cat / proc/meminfo # View memory information

# hostname # View computer name

# lspci-tv # list all PCI devices

# lsusb-tv # list all USB devices

# lsmod # list the loaded kernel modules

# env # View environment variables

Resources

# free-m # View memory usage and swap area usage

# df-h # View the usage of each partition

# du-sh # View the size of the specified directory

# grep MemTotal / proc/meminfo # check the total memory

# grep MemFree / proc/meminfo # check the amount of free memory

# uptime # View system running time, number of users, and load

# cat / proc/loadavg # View system load

Disks and partitions

# mount | column-t # to view the status of attached partitions

# fdisk-l # View all partitions

# swapon-s # View all swap partitions

# hdparm-I / dev/hda # View disk parameters (for IDE devices only)

# dmesg | grep IDE # check the detection status of IDE devices at startup

The network

# ifconfig # View the properties of all network interfaces

# iptables-L # View firewall settings

# route-n # View the routing table

# netstat-lntp # View all listening ports

# netstat-antp # View all established connections

# netstat-s # View network statistics

Process

# ps-ef # View all processes

# top # display process status in real time (more on this in another article)

User

# w # View active users

# id # View specified user information

# last # View user login log

# cut-d:-F1 / etc/passwd # View all users of the system

# cut-d:-F1 / etc/group # View all groups of the system

# crontab-l # View the current user's scheduled tasks

Service

# chkconfig-list # list all system services

# chkconfig-list | grep on # lists all started system services

program

# rpm-qa # View all installed packages

This is the end of the summary of commands for viewing logs in the Linux system. Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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