Execute a remote script on a local server in Linux using ssh - linux

Question

I have a script called "test" on a remote server's home folder that contains the following lines:
#!/bin/bash
tengbe=`ifconfig | grep -B1 192.168 | awk 'NR==1 { print $1 }' | sed 's/://g'`
Basically, it just stores the name of the interface of the local server into a variable once the script is called. When I ssh into the remote server to call the script, I get an error:
ssh remoteserver-IP './test'
./test: line 3: ifconfig: command not found
What might be wrong with my script? I have seen various answers that does not offer a solution to my issue.

Answer 1

Try:
$ ssh remotehost ifconfig
bash: ifconfig: command not found
ifconfig isn't in your PATH on the remote host. You can prove it with:
$ which ifconfig
/sbin/ifconfig
$ ssh remotehost 'echo $PATH'
(returns lots of dirs, none of which is /sbin)
To get around this either specify the full path to ifconfig:
$ ssh remotehost /sbin/ifconfig
... or configure $PATH before calling it:
$ ssh remotehost 'PATH=$PATH:/sbin ifconfig'
... or edit $HOME/.bashrc (or alternatives -- read about your shell's initialisation process) to add /sbin to $PATH all the time.
For security, in a script it's usually better to specify absolute paths, maybe via variables. So in your script:
#!/bin/bash
IFCONFIG=/sbin/ifconfig
tengbe=$(${IFCONFIG} | grep -B1 192.168 | awk 'NR==1 { print $1 }' | sed 's/://g')
Note, I've replaced your backticks with $() - this isn't required, but it's a good habit to adopt - What is the benefit of using $() instead of backticks in shell scripts?