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 <记录文件> Specifies the record file. -N <显示列数> Or <显示列数> Sets the number of displayed columns for the list. -R does not display the host name or IP address of the login system. -X Display system shutdown, reboot, and execution level changes and other information see all reboots, Shutdown records last | grep Rebootlast | grep shutdownhistory Lists all the history: [[Email protected]] # Historical lists only the last 10 records: [[[Email protected]] # 10 (note, History and 10 have spaces in the middle) use the command record number to execute the command, execute the 99th command in the historical list [[email protected]] #!99 (! And 99 no spaces in the middle) to repeat the previous command [[email Protected]] #!! Executes the last command that starts with RPM (the!?? Represents a string that can be randomly lost, the shell will search forward from the last history command, and the first matching command will be executed. ) [[[email protected]] #!rpm list all history by screen: [[[email protected]]#] | More immediately clears history of all current History commands [[email protected]] #history-ccat, tail and watch system all the logs are in the/var/log under their own view (specific use can be self-check, The appendix lists some commonly used logs) Cat/var/log/syslog etc. cat/var/log/*.logtail-f if the log is updated, how to view tail-f/var/log/messages can also use watch-d-N 1 Cat /var/log/messages-d means highlighting different places, and-n indicates how many seconds to refresh. This instruction does not return directly to the command line, but rather to print the new additions in the log file in real time, a feature that is very effective 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 there are too many commands, the key to see personal preferences and business needs. The above-mentioned Linux log files describe the information and error logs of/var/log/message system startup , is one of the most common logs in red Hat Linux/var/log/secure and security phase/var/log/maillog log information associated with the message/var/log/cron log information related to the scheduled task/var/log/spooler log information related to UUCP and news devices/var/log/boot.log The daemon starts and stops related log messages/var/log/wtmp the log file permanently records each user's logon, logoff, and system startup, downtime events
Linux viewing the system's logs for some useful operations
