Introduction to Shell
Q. I just noticed faq about clearing dns cache and there are lots of commands stored in my cache. Can you tell me the command to clear out my command history or cache from a shell prompt?
A. Many programs read input from the user a line at a time. The GNU history library is able to keep track of those lines, associate arbitrary data with each line, and utilize information from previous lines in composing new ones. Bash and other shell may use this history library. The default fie is ~/.history or ~/.bash_history.
To display the history list with line numbers, enter
.... .. 4 cd /tmp/ 5 wget http://downloads.wordpress.org/plugin/cleaner-dashboard.1.1.zip 6 unzip cleaner-dashboard.1.1.zip 7 su - 8 vi /etc/httpd/testing.lan.cyberciti.biz.conf 9 service httpd restart ..... .. 997 vnstat -m -i eth1 998 date 999 yum update 1000 w 1001 ~/scripts/clean.cache rss squid web 1002 history
Note: Lines listed with the a * have been modified.
To clear the history, enter:
$ history -c
The -c option causes the history list to be cleared by deleting all of the entries. For more information, enter:
$ help history
Tags: bash, BASH Shell, Cache, Clear Linux, Command Line, History, Linux, shell, UNIX