Using redirection on the command line is very easy to do. The main strength of the UNIX command line is that you may output data from one command-line application to another. Here is one example. ls -hula | lessls -hula | less This is using the pipe character to pipe the output of the ls(1) … Read more
The bash shell allows the user to redirect output from one application to another or to a file. This is very useful when you are building a one liner script to perform a certain action. Here is a simple redirection. ls > ls.outls > ls.out This redirects the output of the ls command to a … Read more
The UNIX tail command is very useful for viewing the last number of lines of a logfile. As in this example. Showing the last 10 lines in the file /var/log/syslog. |{~}-{Thu Feb 16 21:36:44} -{john@deep-thought } $ tail -n 10 /var/log/syslog Feb 16 21:31:01 deep-thought cron[1480]: (*system*anacron) WRONG FILE OWNER (/etc/cron.d/anacron) Feb 16 21:31:29 deep-thought … Read more