run linux .sh scripts from anywhere ?

[Valuehosted]

I have an odd question that I am hoping one of our more Linux capable members could toss me an answer to.

I have certain commands that I like to run sometimes like:

netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr |more

that displays the number of connections to my server right now for instance; but that is a pretty long thing to remember so I end up having to do a history and cut and paste...

Is there anyway that I could create a bash script which would run the command above and put it in a place so I don't need to include a path to the command just type servconnect.sh for instance and it would run that script - kind of like making my own "linux commands".

I would greatly appreciate your thoughts and help on this.

Kind Regards,
Tony

[dalem]

nano -w myscript.sh

put

netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr |more

inside it
cntl x save

run i it

sh myscript.sh

[Valuehosted]

Thank you Dalem, that did the trick!

I put these in /usr/bin/ is that ok or is it a NONO? This way I can type the commands from anywhere and none of them are server critical - just shorter versions of commands that I use on a daily basis.

Kind Regards,
Tony

[madaboutlinux]

The .sh script won't work directly from the /usr/bin. In such a case, you have to use the complete path to the file. However, there is a workaround for this

Once you create a .sh file and put all your commands in it (don't forget to include the shebang at the start of the .sh file), encrypt the file using the "shc" tool which will create a binary file of your .sh file as .sh.x (binary file). You can now move the binary file under /usr/bin directory and execute the file as a command from any directory of your server.

With shebang I mean the following line at the start of the .sh file

#!/bin/bash

You have to download the "shc" tool from the net and install it. Once done, encrypt the .sh file by executing

shc -f filename.sh

then move the filename.sh.x version under the /usr/bin directory. That's it.

[WiredTree Joe]

Thank you Dalem, that did the trick!

I put these in /usr/bin/ is that ok or is it a NONO? This way I can type the commands from anywhere and none of them are server critical - just shorter versions of commands that I use on a daily basis.

I normally create a bin directory in my user's home directory for my homemade scripts, that are specific to my needs, and then add that to my path. Add the following to your .bashrc:

export PATH="/bin:/sbin:/home/USERNAME/bin:$PATH"

make sure you replace USERNAME with your linux username. Once that is done type:

source ~/.bashrc

to set the new path. Then you can create your bin directory:

cd ~
mkdir bin
cd bin
touch myscript
chmod 770 myscript
vim myscript

I create my scripts with:

#!/bin/bash

at the top so I don't have to type sh in front of the command. For example:

#!/bin/bash
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr |more

You should be able to then call:

myscript

from anywhere on CLI and it will exec your commands inside. Just don't name your commands the same as other commands in /bin, /sbin etc etc.

Hope that helps.

[dalem]

all are good the above are good suggestions
how ever

how ever I just put them in a custom folder for later use and change directory to it

or just chmod it to 750

i you want to just run one command

/myscripts/directory/something.sh