Some Bash tips (command line)

Use brackets

Brackets allow to repeat a text.
For example:

echo {voit,piq,ray}ure

will write voiture piqure rayure.

 

This can be very handy for the command line

cp httpd.conf{,.bak}

will dopy the httpd.conf file in httpd.conf.bak or

diff /etc/httpd/conf/httpd.conf{.bak,}

will do a "diff" command between httpd.conf.bak and httpd.conf files.

Date and Time in a variable

To put it in a variable date, and time is simple:

TheDate=`date +"%Y/%m/%d %H:%M:%S"`

Variable $TheDate will contains date and time.