How do I edit a log file in Linux?

How do I edit a log file in Linux?

To modify the configuration files:

1. Log on to the Linux machine as “root” with a SSH client such as PuTTy.
2. Back up the configuration file you would like to edit in /var/tmp with the command “cp”. For example: # cp /etc/iscan/intscan.ini /var/tmp.
3. Edit the file with vim: Open the file in vim with the command “vim”.

How do I limit the file size of a log in Linux?

Limit the size of the current syslog. To limit the size of /var/log/syslog , you have to edit the /etc/rsyslog. d/50-default. conf , and set a fixed log size.

How do you get to the end of a log file in Linux?

In short press the Esc key and then press Shift + G to move cursor to end of file in vi or vim text editor under Linux and Unix-like systems.

How to empty a log file in Linux?

The safest method to empty a log file in Linux is by using the truncate command. Truncate command is used to shrink or extend the size of each FILE to the specified size. Where -s is used to set or adjust the file size by SIZE bytes.

How to truncate a log file in Linux?

You can simply truncate a log file using > filename syntax. For example if log file name is /var/log/foo, try > /var/log/foo as root user. How to clear the contents of a log file from the command line Say you want to clear the contents of a log file named /var/log/messages, run:

How to reduce the size of a log file?

You can simply truncate a log file using > filename syntax. For example if log file name is /var/log/foo, try > /var/log/foo as root user. Use the truncate command to shrink or extend the size of each FILE to the specified size.

How to clear the contents of a log file?

How to clear the contents of a log file from the command line. Say you want to clear the contents of a log file named /var/log/messages, run: # >/var/log/messages. The following is compatible with various Linux or Unix shells: : > /var/log/messages. Verify file size: # ls -l /var/log/messages.