This is something that I toy with at times and then usually drop to the floor, as I really need to get something done, rather than try a bunch of different options.

It is something that I'd like to figure out for me. I have it worked out for Python …

I recently needed to do this, so ...

Change your remote to SSH from HTTPS or reverse

This article has both Changing a remote's URL

• HTTPS to SSH - Switching remote URLs from HTTPS to SSH
• SSH to HTTPS - Switching remote URLs from SSH to HTTPS

Both are pretty much the same …

how to use AWK to print/filter data

I needed to just print out some columns in a file to see if I was missing something or not, so ... AWK to the rescue.

Some useful urls:

• Take nth column in a text file - I used the second answer by Tom …

I need to remove the first two columns in a CSV file that was generated from Mockaroo, but I had to create a date and time field in it as well, to get the correct format for a date field(s), as it didn't let me completely generate what I …

Nice article at Better Dev blog. Has an interesting Minimal safe Bash script template with a nice template to start with.

Much like what I have but with some other features that I didn't think about or didn't need. It could be very useful. I might steal some of the …

What is the bash shortcut to change to the previous directory?

A nice description here of how this works. Can be used in git as well.

From man page for bash:

When a is used as the operand, this shall be equivalent to the command: cd "$OLDPWD" && pwd which changes …

How to export specific data from jrnl to jq md format

#### this needs to be run in cmd-grid to work as intended
md -v jqmdraw -contains "RWS-5760"

#### the actual jrnl command would need to be something like the following
#### with the assumption that you have the other files as well …

how to write a find-exec loop that exits on failure

I was trying to figure this out for a command I needed to run in Grid, but, it's a useful pattern in general.

How to exit from find -exec if it fails on one of the files

The answer from …

I was wondering how to read a YAML file in bash or if it was possible (without super-human effort) and pkuczynski - parse_yaml.sh script does it and seems to be fairly straight-forward.

I haven't tried it yet, but it looks fairly easy.

Simple command line tool for scheduling scripts

hickory - schedule Python scripts - this looks interesting. I think it might have some good uses.

One use, that I'm using for exporting my journals, but am not happy with, could be a good candidate for this tool. It might be doing much the …

This will get the destination of the soft-link (whether it's a file or directory) and return it.

Find only destination of symlink

Good answers in all, but had a problem with the first answer using readlink (by nikitautiu) as the version that macOS is using, doesn't have the same flags …

There are many times that I have no idea of where a command I use actually resides in the system. Sometimes I do, and what I'm calling is not the command that I know it should be, so ... How do you tell where the command that works from the command …

Here is the json to text conversion, that was part of the view jrnl project, but I couldn't get working for some reason when I tried it.

Anyway, had some time today and decided that I should try it, as it would be very helpful to know how to do …

The link, How do I find all files containing specific text on Linux? shows how to use grep to accomplish this.

It also shows the typical find command that is recommended, which, like the poster, I didn't get to work for me either, so ...

The answer I used is by …

Even though bash doesn't technically allow you to return a value (even through it has a return statement), there are ways you can accomplish this in the Return a value in a bash script says how, but I like tamasgal's answer best:

function fun1(){
  echo 34
}

function fun2(){
  local …

Here is how you assign what comes back from an echo statement to a bash variable.

How to assign the result of echo to a variable in bash script

MY_CHOICE=`echo $1 | tr "[:lower:]" "[:upper:]"`

What I wanted to do was to set a variable in bash from a function. Not as easy as I would have hoped.

Returning values from bash functions

Here is the choice I used from the article:

The other way to return a value is to write your function so …

Found a couple places (took me a minute to figure out what they meant - sort of thick at times).

• uppercase to lowercase in bash on a mac
• bash lowercase or uppercase strings

Here is the code:

#### https://linuxhint.com/bash_lowercase_uppercase_strings/
#### upper-case the passed in choice 
####  - have to use for bash …

locate is a good alternative to using find

As noted in the finding the Tools/scripts subdirectory in stackoverflow:

This command

  $ locate "Tools/scripts/diff.py"

will find the location of the file if it's installed. This depends on the database generated regularly by the updatedb command (this usually runs …

How to get directory listing with human readable file sizes

Usually, it doesn't matter too much, but it's nice to have the sizes shown rather than the bytes.

Code or Examples

alias lh='ll -h'

Now, should have two decent directory listings: ll and lh.

BASH command output to the variable has great examples of how to do this. Basically, it boils down to something like this:

variable=$(command)
variable=$(command [opotion...] arg1 arg2 ...)
variable=$(/path/to/command)

You can also use the "`" as well, with all the caveats of using it in bash entails …

It has some good stuff. I ran across it as I was looking at viewjrnl, a different viewer for jrnl (it doesn't work like it should, or I'd be writing about it instead). Anyway, the main tool it used was jq.

jq processor:

jq is like sed for JSON data …

So many interesting things to learn here.

I knew about aliases and use them all the time. I had forgotten how to undefine them though, so ...

alias

Here is how to define one:

alias someaction="some sort of action or something here"

You use it like you'd expect. At …

Useful to put in your .bash_profile file to remove all of the churn that gets added to your PATH environment variable.

#### -------------------
#### remove any duplicates in PATH - w/o changing order
#### -- https://stackoverflow.com/questions/11650840/remove-redundant-paths-from-path-variable
#### -------------------
export PATH="$(echo "$PATH" | awk 'BEGIN{RS=":";}
{sub(sprintf("%c$",10),"");if(A[$0 …

It seems that you have to put the following in your (at the end) .bash_profile or .szhrc:

eval "$(pyenv init -)"

A good source for this was: pyenv don't switch between python versions on macos #1446. Also, there is some good information on Catalina, where Apple switched to zsh as the …

I don't always need this, but at times, it is quite useful - view files in zip.

One command I was unaware of and one I had forgotten: zipinfo Archive.zip and unzip -l Archive.zip. Both should do the trick.

Here is basically what you need to do:

git push -u origin [your_branch_name]

an example:

git push -u origin dev_WEB_2020.04_STK_RWS-17501-addMegaHoverForUnderlying

This gets it up to the remote.

An interesting way to look at and fix a problem. Bash - when did I run that command?

I might try to use something like that for a different problem, but the solution might be just as valid.

Found a cool way to do a script (by Sparhawk in StackExchange) so that if you use sudo more than once or if a command requires you to enter your password, you should only have to enter it once.

I've used it already in my TCServer_restart.sh script and it …

PS1 Generator

A nice site to play with how you can manage/configure your bash prompt. Bash Prompt Generator

Other useful PS1 stuff

Found some tips on dynamic bash script. I tried to do some stuff and my attempt is shown below. It didn't work for the situation that I …

Using a back-tick quoted thing sends thing to the os to be executed. Not sure how useful that would be right now, but I could see where it might come in handy at some point.

jrnl notes "@jrnl Trying back-tick to enter date into entry.  I'm going to try …

I thought it had a great explanation of some things I hadn't thought of, and it was very complete. pushd and popd commands

A useful thing to remember when you want to go back to where you started to do something!

Here is a shell function and alias to define a way to view your PATH environment variable (i.e. - one directory path per line). Don't need to too often, but when I do, it's quite useful:

nice_path() {
    tr ':' '\n' <<< $PATH
}
alias nicepath=nice_path

I made it an alias as well …

In the Include Files in Bash article, it gives some good examples (i.e. one reason to do this is for data, so it doesn't clutter up your script -- not stated, but I would use it this way).

Basically, it amounts to the following:

#!/usr/bin/env bash

source other-file …

This is a handy bash script to remove duplicate PATH directories but doesn't modify the order of the path already listed. Pretty cool idea.

Here is the url: remove duplicate dirs from PATH

Here is the code:

export PATH="$(echo "$PATH" | awk 'BEGIN{RS=":";}
{sub(sprintf("%c$",10),"");if(A …