What is “-bash: !”: event not found”
You can turn off history substitution using set +H.
shell
Shell command to monitor changes in a file
Do you mean tail -f logfile.log ? (Man page for tail)
What is the difference between double and single square brackets in bash?
There are several differences. In my opinion, a few of the most important are: [ is a builtin in Bash and many other modern shells. The builtin [ is similar to test with the additional requirement of a closing ]. The builtins [ and test imitate the functionality /bin/[ and /bin/test along with their limitations … Read more
How do I know the script file name in a Bash script?
For reading through a symlink1, which is usually not what you want (you usually don’t want to confuse the user this way), try: IMO, that’ll produce confusing output. “I ran foo.sh, but it’s saying I’m running bar.sh!? Must be a bug!” Besides, one of the purposes of having differently-named symlinks is to provide different functionality … Read more
Integer expression expected error in shell script
You can use this syntax:
Can pm2 run an ‘npm start’ script
PM2 now supports npm start: To assign a name to the PM2 process, use the –name option:
sed whole word search and replace
\b in regular expressions match word boundaries (i.e. the location between the first word character and non-word character):
How to parse XML in Bash?
This is really just an explaination of Yuzem’s answer, but I didn’t feel like this much editing should be done to someone else, and comments don’t allow formatting, so… Let’s call that “read_dom” instead of “rdom”, space it out a bit and use longer variables: Okay so it defines a function called read_dom. The first line makes … Read more
Shell Script: Execute a python program from within a shell script
Just make sure the python executable is in your PATH environment variable then add in your script Details: In the file job.sh, put this Execute this command to make the script runnable for you : chmod u+x job.sh Run it : ./job.sh
using rot13 and tr command for having an encrypted email address
Not sure exactly how you want to use this, but here’s a basic example to get you started: To make it easier, you can alias the tr command in your .bashrc file thusly: Now you can just call: