Organize Linux to view some of the frequently used commands for system logs
Last
-a the host name or IP address from which to log in to the system, displayed on the last line.
-d Specifies the record file. Specifies the record file. Converts an IP address into a host name.
-F < record file > specify record file.
-N < Show columns > or-< Show columns > set the number of displayed columns for the list.
-R does not display the host name or IP address of the login system.
-X displays information such as system shutdown, another boot, and changes in operational levels
Here's a look at the full reboot, shutdown record
Last | grep Rebootlast | grep shutdown
History
List all the history records:
[[email protected]] # History
Just list the latest 10 records:
[[email protected]] # History 10 (note, history and 10 have spaces in between)
Run the command using the command record number, run the 99th command in the history list
[[email protected]] #!99 (! And 99 no spaces in the middle)
Run the previous command repeatedly
[Email Protected]linux] #!!
Run the last command that starts with RPM (!?? Represents a string that can be randomly lost, the shell will search forward from the last history command, and the first match will be run. )
[[email protected]] #!rpm
List all history by screen:
[[Email protected]]# History | More
Clear the history of all historical commands now.
[[email protected]] #history-C
cat, tail and watch
All of the system's logs are under/var/log (detailed use can be self-check, appendix lists some frequently used logs)
Cat/var/log/syslog et Cat/var/log/*.log
tail-f
Assume that the log is updated. How to view tail-f/var/log/messages in real time
can also use watch-d-N 1 cat/var/log/messages
-d means highlighting different places, and-n indicates how many seconds are refreshed.
This instruction does not return directly to the command line, but instead prints the newly added content in the log file in real time.
This feature is useful for viewing logs. If you want to terminate the output, press CTRL + C.
In addition to more, less, dmesg|more, here does not make a list, because of the command too much, the key to see personal preferences and business needs. The ones that are often used by individuals
Linux log file description
/var/log/message system startup information and error logs are one of the most frequently used logs in red Hat Linux
/var/log/secure Security-related log information
/var/log/maillog message-related log information
/var/log/cron log information related to timed tasks
/var/log/spooler log information related to UUCP and news devices
/var/log/boot.log Daemon starts and stops related log messages
/var/log/wtmp This log file permanently records every user logon, logoff, and system startup, downtime events
Extended Reading
The Linux frequently used commands series technical Articles to organize collections
1 Introduction to Linux Curl Usage (1)
2Linux Find command-path-prune role specific introduction
3Linux How to use the Locate command to find data to find the specified file
Summary of how to view memory usage under 4Linux
5CentOS How to set the DVD as the default yum source for download and installation of software on DVD
6Linux tar command tar time Stamp in the future Problem solving method
7Linux How to use the awk Text Processing tool to sort arrays
8CentOS 6.5 System setting fixed IP method
9Linux Normal Form Usage guide
wget command operation example for downloading files in 10Linux system
11Linux PS Command Combat
12 those features of the DF command that you do not know under Linux
1320 Linux Command interview quiz
144 Most popular open source code editors for Linux platforms
15Ubuntu Text Editor vi workaround for error using arrow keys
16Linux view some frequently used command summaries of system logs
17Linux How to improve the copy efficiency of large files to save time
What commands does the 18linux system use to check port occupancy?
19Linux Text Search tool grep uses specific explanations
20Linux xargs Command
8 ways to count file lines in 21Shell script
22 Troubleshooting Long idle hours after SSH login disconnect
23centos User-related commands
24grep how to ignore filtering. SVN folder and how to ignore multiple folders
25centos User-related commands
26 Troubleshooting long idle hours after SSH login disconnect
27Apache, PHP hidden version number information
14 Practical examples of SORT commands in 28Linux (i)
2,914 examples of Linux grep commands
3,011 of Linux terminal commands that surprise you
31linux, Unix method of high-speed emptying files
32Centos view real-time traffic command for NIC
335 Classic Interesting Linux command-line tricks
34Linux Ctrl + Z usage
3,512 Linux Process Management commands introduced
36 tutorial on compressing and decompressing files using the tar command in a Linux system
7 commands for browsing Web pages and downloading files in 37Linux
In 38Linux. Useful commands for creating chat server, removing redundant packages
39 explain how to use the md5sum command in Linux system
Organize Linux to view some of the frequently used commands for system logs