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Full Discussion: How to run several bash commands put in bash command line?
Top Forums Shell Programming and Scripting How to run several bash commands put in bash command line? Post 303011707 by drysdalk on Monday 22nd of January 2018 07:00:21 PM
Old 01-22-2018
Hi,

If you're using Bash, then the simplest way to do this is just to separate them with semi-colon (;) characters. Commands separated by semi-colons will be executed one after the other, regardless of the success or failure of the preceding command.

Example:

Code:
$ echo "This is the output of the first command." ; /bin/ls -F / ; echo "This is the output of the third command."
This is the output of the first command.
bin/   dev/  home/                 lib/    lost+found/  mnt/  proc/  run/   srv/  tmp/  var/
boot/  etc/  installCDE.15787.log  lib64/  media/       opt/  root/  sbin/  sys/  usr/
This is the output of the third command.
$

There are a few other ways to do this. If you only want the next command in the chain to be executed if the previous command was a success, then you can use a logical 'and' operator, represented by two ampersand (&) symbols:

Code:
$ echo "First command." && /bin/true && echo "The two previous commands returned 0, so we get to run our third."
First command.
The two previous commands returned 0, so we get to run our third.
$

And lastly, if you only want a command chain to continue if the previous command fails rather than succeeds, you can use the logical 'or' operator, represnted by a double pipe (|) symbol:

Code:
$ echo "First command". || /bin/true || echo "This time, we won't see the third command."
First command.
$

Hope this helps.
 

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LEARN ABOUT POSIX

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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