You can also view multiple log files at the same time (using “tail -f”). aureport is a command line utility used for creating useful summary reports from the audit log files stored in /var/log/audit/. In that case, you can use script:. In short /var/log is the location where you should find all Linux logs file. You can rotate log file using logrotate software and monitor logs files using logwatch software. Log files are the records that Linux stores for administrators to keep track and monitor important events about the server, kernel, services, and applications running on it. Usually the history file is written to upon logout, therefore if you have an SSH session that has timed out you will not have your history from that session when you log back in. The default file is ~/.history or ~/.bash_history. It is an easy-to-use utility; simply pass an option for a specific kind of report that you need, as shown in the examples below. Write To History File. To clear the file, you need to write the history list to the file: history -chistory -w Modifying History Behavior # The behavior of the Bash history can be defined using several different environment variables. bash’s history function depends on a variable called HISTFILE, normally set to the current user’s .bash_history file (located in the user’s home directory). How to create log file from script But the problem is so much output information comes up on the screen and i can only move up a few screens lengths, is there some code i can put into the script that create a log file from the screen output. When modifying the history behavior, set the variables in ~/.bashrc or any other configuration file which is loaded when the user logs in. Manually Updating the History File. Bash's history feature. Your ~/.bash_history or similar file will already have your history from past sessions saved. However, some applications such as httpd have a directory within /var/log/ for their own log files. [[email protected] ~]# history -w; 8. When you log in or open a terminal session, the history list is read in from the history file. Is there any way to make a log file for maintaining some data in /var/log/ with the help of some library function or system call in c language in linux. yep. Some applications also write log files in this directory. And I also want to know the standards that we should follow to write and process log. Use this data to verify that your cron jobs are running successfully. In Bash, the default history file is .bash_history. ; tail – If you want to view the content of the log files real time, as the application is writting to it, use “tail -f”. 7. Your question is a little unclear whether you are wanting the output as well since “log of all commands” could be interpreted either way. you have to call `history -a; history -r` on bash_command, because bash tries to optimize things by never reading the file, while it also tries to make it resilient to power failures by always writing the file from memory to the disk. When echoed, it returns the full path and name of the user’s history file, like so: script(1) - Linux man page Name script - make typescript of terminal session Synopsis script [-a] [-c COMMAND] [-f] [-q] [-t] [file] Description Script makes a typescript of everything printed on your terminal. Like ausearch, it also accepts raw log data from stdin. The example as given is probably unnecessary unless you want unwritten history from the current session. 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