/var/log/cron stores information about scheduled tasks (cron jobs). 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. And I also want to know the standards that we should follow to write and process log. In Bash, the default history file is .bash_history. When modifying the history behavior, set the variables in ~/.bashrc or any other configuration file which is loaded when the user logs in. 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. vi – If you are comfortable with the vi commands, use vi editor for quick log file browsing. Your question is a little unclear whether you are wanting the output as well since “log of all commands” could be interpreted either way. 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. aureport is a command line utility used for creating useful summary reports from the audit log files stored in /var/log/audit/. Bash's history feature. Use this data to verify that your cron jobs are running successfully. In that case, you can use script:. You can rotate log file using logrotate software and monitor logs files using logwatch software. 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. 7. Some applications also write log files in this directory. The default file is ~/.history or ~/.bash_history. yep. ; tail – If you want to view the content of the log files real time, as the application is writting to it, use “tail -f”. When you log in or open a terminal session, the history list is read in from the history file. 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). 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. 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. 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. Manually Updating the History File. Your ~/.bash_history or similar file will already have your history from past sessions saved. The example as given is probably unnecessary unless you want unwritten history from the current session. In this post, we'll go over the top Linux log files server administrators should monitor. You can also view multiple log files at the same time (using “tail -f”). Any changes you make in your current terminal window session are only written to the history file when you close the terminal window or log out. [[email protected] ~]# history -w; 8. Write To History File. We can force the current history to write to the users ~/.bash_history file with the -w option. 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. However, some applications such as httpd have a directory within /var/log/ for their own log files. In short /var/log is the location where you should find all Linux logs file. Like ausearch, it also accepts raw log data from stdin. Current session Linux log files in this directory ausearch, it also accepts raw data... Httpd have a directory within /var/log/ for their own log files server administrators should.. 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