What should I do if my bash script is not running?

What should I do if my bash script is not running?

If there is, it will execute /usr/local/bin/foo. If not, it will see if there’s an executable command /usr/bin/foo and if not there, it will look to see if /bin/foo exists, etc. until it gets to /Users/david/bin/foo. If it can’t find a command foo in any of those directories, it tell me command not found.

How to execute a bash script from the command line?

Then mark the script as executable and execute it from the command line or simply execute bash from the command line passing in your script as a parameter Make sure you are not using “PATH” as a variable, which will override the existing PATH for environment variables.

Why is cron job not running with same user?

The cron job doesn’t run with the same user with which you are executing the script manually – so it doesn’t have access to the same $PATH variable as your user which means it can’t locate the Java executable to execute the commands in the script. We should first fetch the value of PATH variable as below and then set it (export) in the script –

Where to find a command in a Unix shell?

Unix has a variable called PATH that is a list of directories where to find commands. If I type a command foo at the command line, my shell will first see if there’s an executable command /usr/local/bin/foo. If there is, it will execute /usr/local/bin/foo.

How to know if a command is not found in Bash?

If not, it will see if there’s an executable command /usr/bin/foo and if not there, it will look to see if /bin/foo exists, etc. until it gets to /Users/david/bin/foo. If it can’t find a command foo in any of those directories, it tell me command not found.

What happens if I type foo in Bash?

If I type a command foo at the command line, my shell will first see if there’s an executable command /usr/local/bin/foo. If there is, it will execute /usr/local/bin/foo. If not, it will see if there’s an executable command /usr/bin/foo and if not there, it will look to see if /bin/foo exists, etc. until it gets to /Users/david/bin/foo.

Why are some of my Bash commands not found?

It looks to me that at one point or another you are overwriting the default PATH environment variable. The type of errors you have, indicates that PATH does not contain /bin, where the above commands (including bash) reside. One way to begin debugging your bash script would be to start a subshell with the -x option:

How to see every command executed in Bash?

One way to begin debugging your bash script would be to start a subshell with the -x option: This will show you every command, and its arguments, which is executed when starting that shell. The –login option is specified because .bash_profile is read by login shells.

Where can I find the command str in Bash?

And yes, bash is located at /bin/bash. You cannot have spaces around the = sign. bash tries to run a command named STR with 2 arguments (the strings = and foo) bash tries to run a command named STR with 1 argument (the string =foo)

Which is the correct path to run bash?

While #!/bin/bash may be the correct location on your system, that’s not universal. Additionally, that may not be the user’s preferred bash. #!/usr/bin/env bash will select the first bash found in the path.

Why is my bash script not running with crontab?

In my case, the issue was that the script wasn’t marked as executable. To make sure it is, run the following command: Do crontab -e for whichever crontab you’re using and replace it with output of the above command. This should mirror most of your environment in case there is some missing path issue or something else.

How to make a command work in shell?

In shell, command with debug options gives out about 50 lines of logs. whereas is the carriage return character, causing the trailing apostrophe to overwrite the beginning of the line. Make sure that your script contains Unix-style newlines (NL only). are three significantly different ways of invoking a script.

Why is my command not found on empty?

Your problem is probably a single line in the file referencing a program that’s either not on the path, not installed, misspelled, or something similar.

How to change the path of a bash script?

Use the command bash foo since foo is a shell script. Include the directory name when you eecute the command like /Users/david/foo or $PWD/foo or just plain ./foo. Change your $PATH variable to add the directory that contains your commands to the PATH. You can modify $HOME/.bash_profile or $HOME/.profile if .bash_profile doesn’t exist.

What happens when Bash is started non-interactively?

When Bash is started non-interactively, to run a shell script, for example, it looks for the variable BASH_ENV in the environment, expands its value if it appears there, and uses the expanded value as the name of a file to read and execute. Bash behaves as if the following command were executed:

Do you need to know Bash’s full path?

I have a Bash script that needs to know its full path. I’m trying to find a broadly-compatible way of doing that without ending up with relative or funky-looking paths. I only need to support Bash, not sh, csh, etc.

How to know the script file name in a bash?

To answer Chris Conway, on Linux (at least) you would do this: readlink prints out the value of a symbolic link. If it isn’t a symbolic link, it prints the file name. -n tells it to not print a newline. -f tells it to follow the link completely (if a symbolic link was a link to another link, it would resolve that one as well).

How to check if a process is running or not?

Bash check if process is running or not Bash commands to check running process: pgrep command – Looks through the currently running bash processes on Linux and lists the process IDs (PID) on screen.

How to get the output of a bash script?

One way is to place a set -x at the top of your script or run it with bash -x instead of just bash – this will output the lines before executing them and you usually just need to look at the command output immediately before the error to see what’s causing the problem

Which is the command that Bash is going to run?

In that context, a word is the command that bash is going to run. Any string containing = (in any position other than at the beginning of the string) which is not a redirection is a variable assignment, while any string that is not a redirection and does not contain = is a command.

How to run a bash script on a remote machine?

I have a script (say run.py) and I want to scp that to a remote machine (say 10.1.100.100 ), cd into a directory in that remote machine, and execute run.py in that directory. How do I wrap the above procedure in one single bash script? I don’t know how to let bash execute commands remotely in another machine.

How to run a script remotely over SSH?

Script execution over SSH without copying script file. You need a simple SSH connexion and a local script. This script performs this operations: 1° catches first line #! to get interpreter (i.e: Perl, Python, Ruby, Bash interpreter), 2° starts remote interpeter over SSH, 3° send all the script body over SSH.

How to run a script remotely in Perl?

You need a simple SSH connexion and a local script. This script performs this operations: 1° catches first line #! to get interpreter (i.e: Perl, Python, Ruby, Bash interpreter), 2° starts remote interpeter over SSH, 3° send all the script body over SSH. This script is not based on local script extension but on #! information.

What happens when I run bash as SH?

Even if /bin/sh is a symlink to bash, bash will run in a POSIX compatibility mode when run as sh, disabling some (but not all) bash features. You’ll also need to make sure the script is executable, of course. An alternative, strongly discouraged way is adding . to PATH.

Is it possible to run bash on Windows 10?

First, this is the first time we’re releasing this technology – it’s marked as beta for a reason: We know that there are some rough edges and that some things will break! Do not expect every Bash script and tool that you run will work perfectly – there will be gaps.

How to run bash script on startup on Linux?

To get this to log to syslog/rsyslog you typically can use the logger command to do so: You can then see it in your /var/log/messages or /var/log/syslog or journal -xef. Here I’m using journald: $ journalctl -xef

How did you source ~ /.bash _ profile file?

All we know is: you have a bash_profile file and it was sourced. But how did you start your server, how did you invoke the startup file of jetty server, what kind of shell script is used to source ~/.bash_profile ?