Frequently Asked Questions About Linux / UNIX » echo command http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Fri, 03 Feb 2012 22:38:32 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Linux: Set Environment Variablehttp://www.cyberciti.biz/faq/set-environment-variable-linux/ http://www.cyberciti.biz/faq/set-environment-variable-linux/#comments Thu, 14 Apr 2011 12:18:34 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10245 Bash shell is used for various purposes under Linux. How do I customize the shell environment variable under Linux operating systems?]]> http://www.cyberciti.biz/faq/set-environment-variable-linux/feed/ 4 Howto: Call Shell Script function In echo statementhttp://www.cyberciti.biz/faq/unixlinux-bash-shell-script-function-call-in-echo-command/ http://www.cyberciti.biz/faq/unixlinux-bash-shell-script-function-call-in-echo-command/#comments Fri, 21 Jan 2011 19:07:23 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9808 I need to call the function called foo() using echo command in the same statement. How do I all or invoke the function using the echo statement?]]> http://www.cyberciti.biz/faq/unixlinux-bash-shell-script-function-call-in-echo-command/feed/ 1 Explains: echo Command (echo $”string”) Double-quoted String Preceded By a Dollar Signhttp://www.cyberciti.biz/faq/bash-localization-with-echo-command/ http://www.cyberciti.biz/faq/bash-localization-with-echo-command/#comments Fri, 22 Oct 2010 12:06:57 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9060 I noticed that many shell scripts in /etc/init.d/ directory use the following syntax:
echo $"Usage $prog start|stop|reload|restart"
Why a double-quoted string preceded by a dollar sign ($"string") using the echo command under Linux / UNIX bash scripts?]]> http://www.cyberciti.biz/faq/bash-localization-with-echo-command/feed/ 2 UNIX / Linux: Shell Scripting With mail Commandhttp://www.cyberciti.biz/faq/linux-unix-bash-ksh-csh-sendingfiles-mail-attachments/ http://www.cyberciti.biz/faq/linux-unix-bash-ksh-csh-sendingfiles-mail-attachments/#comments Sat, 02 Oct 2010 07:15:21 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=8909 How do I send e-mails from a shell script including file attachments?]]> http://www.cyberciti.biz/faq/linux-unix-bash-ksh-csh-sendingfiles-mail-attachments/feed/ 3 HowTo: Verify My NTP Working Or Nothttp://www.cyberciti.biz/faq/linux-unix-bsd-is-ntp-client-working/ http://www.cyberciti.biz/faq/linux-unix-bsd-is-ntp-client-working/#comments Thu, 25 Mar 2010 17:11:28 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=6885 I've setup an NTP (Network Time Protocol) client and/or server to manage the system clock over a network. But, how do I verify that it is working correctly?]]> http://www.cyberciti.biz/faq/linux-unix-bsd-is-ntp-client-working/feed/ 1 Linux: Change the PATH [ Add New Directory ]http://www.cyberciti.biz/faq/bash-linux-change-path-variable-etc-byediting-profile-bash_profile/ http://www.cyberciti.biz/faq/bash-linux-change-path-variable-etc-byediting-profile-bash_profile/#comments Mon, 01 Feb 2010 11:02:02 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9892 How do I change the PATH settings under Linux operating systems and add a new directory to $PATH under bash shell?]]> http://www.cyberciti.biz/faq/bash-linux-change-path-variable-etc-byediting-profile-bash_profile/feed/ 0 HowTo: Display / Echo Path Settings In Linux / UNIX / *BSDhttp://www.cyberciti.biz/faq/echo-path-in-linux-unix-apple-osx-freebsd-openbsd-netbsd/ http://www.cyberciti.biz/faq/echo-path-in-linux-unix-apple-osx-freebsd-openbsd-netbsd/#comments Mon, 01 Feb 2010 10:54:19 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9889 How do I display my current path settings under Linux / FreeBSD / OpenBSD / NetBSD / Apple OS X / UNIX like operating systems using bash or ksh or csh / tcsh shell?]]> http://www.cyberciti.biz/faq/echo-path-in-linux-unix-apple-osx-freebsd-openbsd-netbsd/feed/ 0 xargs: How To Control and Use Command Line Argumentshttp://www.cyberciti.biz/faq/linux-unix-bsd-xargs-construct-argument-lists-utility/ http://www.cyberciti.biz/faq/linux-unix-bsd-xargs-construct-argument-lists-utility/#comments Tue, 17 Feb 2009 15:14:44 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=3309 I am trying to use xargs command using shell pipes and not able to understand how to control and use command line arguments. For example I'd like to find out all *.c file located in 100s of sub-directories and move them to another directory called ~/old.src. How do I use command line args with xargs to achieve the same? ]]> http://www.cyberciti.biz/faq/linux-unix-bsd-xargs-construct-argument-lists-utility/feed/ 38 Bash For Loop Exampleshttp://www.cyberciti.biz/faq/bash-for-loop/ http://www.cyberciti.biz/faq/bash-for-loop/#comments Fri, 31 Oct 2008 06:21:02 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=2284 How do I use bash for loop to repeat certain task under Linux / UNIX operating system? How do I set infinite loops using for statement? How do I use three-parameter for loop control expression?]]> http://www.cyberciti.biz/faq/bash-for-loop/feed/ 202 Linux Change The I/O Scheduler For A Hard Diskhttp://www.cyberciti.biz/faq/linux-change-io-scheduler-for-harddisk/ http://www.cyberciti.biz/faq/linux-change-io-scheduler-for-harddisk/#comments Mon, 09 Jun 2008 13:13:37 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=1097 How do I change the I/O scheduler for a particular hard disk without rebooting my Linux server system?]]> http://www.cyberciti.biz/faq/linux-change-io-scheduler-for-harddisk/feed/ 6 FreeBSD Display Environment Settingshttp://www.cyberciti.biz/faq/freebsd-setenv-command/ http://www.cyberciti.biz/faq/freebsd-setenv-command/#comments Mon, 17 Mar 2008 19:06:40 +0000 Vivek Gite http://www.cyberciti.biz/faq/freebsd-setenv-command/ http://www.cyberciti.biz/faq/freebsd-setenv-command/feed/ 1 Bash While Loop Examplehttp://www.cyberciti.biz/faq/bash-while-loop/ http://www.cyberciti.biz/faq/bash-while-loop/#comments Sat, 15 Mar 2008 15:23:47 +0000 Vivek Gite http://www.cyberciti.biz/faq/bash-while-loop/ How do I use bash while loop to repeat certain task under Linux / UNIX operating system? How do I set infinite loops using while statement?]]> http://www.cyberciti.biz/faq/bash-while-loop/feed/ 11 How To Read / Print $PATH Shell Variablehttp://www.cyberciti.biz/faq/how-to-read-print-path-shell-variable/ http://www.cyberciti.biz/faq/how-to-read-print-path-shell-variable/#comments Sun, 13 Jan 2008 13:13:02 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=1925 Q. I'm new to Unix / Linux and I'd like to print current values of $PATH variable. How do I read $PATH from a shell prompt?]]> http://www.cyberciti.biz/faq/how-to-read-print-path-shell-variable/feed/ 0 Display or print UNIX / Linux path ~ $PATH variablehttp://www.cyberciti.biz/faq/howto-print-path-variable/ http://www.cyberciti.biz/faq/howto-print-path-variable/#comments Tue, 11 Sep 2007 10:45:09 +0000 Vivek Gite http://www.cyberciti.biz/faq/howto-print-path-variable/ http://www.cyberciti.biz/faq/howto-print-path-variable/feed/ 2 BASH Shell change the color of my shell prompt under Linux or UNIXhttp://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/ http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/#comments Fri, 06 Oct 2006 22:29:55 +0000 Vivek Gite http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/ http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/feed/ 44 sed: Remove All Except Digits (Numbers) From Inputhttp://www.cyberciti.biz/faq/sed-remove-all-except-digits-numbers/ http://www.cyberciti.biz/faq/sed-remove-all-except-digits-numbers/#comments Sat, 19 Aug 2006 12:05:47 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4917 How do I remove all (text, special characters, white spaces, tabs etc) from my text file (input) except numbers (digits) using sed command?]]> http://www.cyberciti.biz/faq/sed-remove-all-except-digits-numbers/feed/ 2 How to: Add or display today’s date from a shell scripthttp://www.cyberciti.biz/faq/bash-shell-script-how-to-add-todays-date/ http://www.cyberciti.biz/faq/bash-shell-script-how-to-add-todays-date/#comments Sat, 28 Jan 2006 15:50:00 +0000 Vivek Gite http://www.cyberciti.biz/faq/faq/bash-shell-script-how-to-add-todays-date.php http://www.cyberciti.biz/faq/bash-shell-script-how-to-add-todays-date/feed/ 8