Get first days of month
How can I get the last 12 first day of every month in YYYY.MM.DD format?
For example if today is Mar 13 output should be
2024.03.01
2024.02.01
2024.01.01
2023.12.01
2023.11.01
2023.10.01
2023.09.01
2023.08.01
2023.07.01
2023.06.01
2023.05.01
2023.04.01
It is possible with bash loop but is there a simpler way with any command line tool?
https://redd.it/1bdye78
@r_bash
How do I mount a Windows drive in WSL by its drive name?
How can I mount Windows drives to a folder in /mnt that matches the drive's name, without manually creating the folders for each drive?
The way I've been doing it so far is with this:
for letter in {d..g}; # D to G because those are the only drives I'm interested in
do
if [ -d /mnt/$letter ]; then
sudo mount -t drvfs "$letter": "/mnt/$letter" &> /dev/null || {
warn "Unable to mount win drive $letter:\\ :: NOT_CONNECTED";
continue
};
fi;
done;
Which will mount each drive by its Windows drive letter (Assuming the folder already exists). But I'd like for the script to create the folders as needed and mount the drives.
Is this something I can do?
https://redd.it/1bd9k5n
@r_bash
I just published my first article on Medium, check it out 👋
belalsamyyy/blazing-fast-file-management-for-terminal-️-ee6bb208d7d1">belalsamyyy/blazing-fast-file-management-for-terminal-" rel="nofollow">https://medium.com/@belalsamyyy/blazing-fast-file-management-for-terminal-️-ee6bb208d7d1
https://redd.it/1bcc0yt
@r_bash
Send monit alert at most once in Linux?
My script to send sms
#send-sms.sh
curl "http://10.10.10.10:1084/somerandomhexcode&username=username@goes.here&password=passwordgOesHere&countryCode=countrycodegoeshere&mobileNumber=%2bphonenumberwithcountrycodegoeshere&message=messagegoeshere"
I've tested this script independently and it sends SMS successfully.
My monit config to check if a certain glassfish domain is down:
check host DOMAINIWANTTOCHECK with address 127.0.0.1
if failed port 10080 then exec "/root/send-sms.sh"send-sms.sh is executable with chmod 777.
Imagine a scenario where the server goes down at 11 PM till 5AM, and alert keeps going every 60 seconds. It'll be an absolute nightmare. How do I avoid such scenarios?
https://redd.it/1bbvww4
@r_bash
Bash Matrix
https://github.com/wick3dr0se/matrix
https://redd.it/1bbhgwn
@r_bash
How to parse multipart/form-data
How to parse the multipart form-data to extract the file content? Has anyone done it or any link to working solution will be highly appreciated.
https://redd.it/1bbd7v2
@r_bash
BASHT: A terminal file manager bash script that supports image previews (among other features).
https://gitlab.com/christosangel/basht
https://redd.it/1baqz09
@r_bash
Please help me convert this countdown timer from seconds to minutes.
Hi, some time ago, I stole this function from somewhere. I don't even remember where, possibly unix.stackexchange:
countdown() {
start="$(( $(date '+%s') + $1))"
while $start -ge $(date +%s) ; do
time="$(( $start - $(date +%s) ))"
printf '%s\r' "$(date -u -d "@$time" +%H:%M:%S)"
sleep 0.1
done
}
So, I want a countdown for 30 minutes, I'll do:
$ countdown 1800
which is fine. But how can I convert the above function to have $1 as minutes instead of seconds?
Thanks in advance.
https://redd.it/1bafb39
@r_bash
How to escape this string? Store command as string and then execute it
How to escape the following command? `weechat -r -sh` expects a shell command and I pass it the rest of the line (the awk command sent to $fifo).
weechat -r '/exec -sh awk '{sub(/^#.| #./, ""); { if ( $0 != "" ) { print ""$0 }}}' "$HOME/.config/weechat/weechat-init.conf" > "$fifo"'
I'm also running that same awk command later on in the script so I want to store it as a variable and re-use it. For best practices, does it matter if I store it as a string to eval or as an array that gets expanded on its own and run that way? Actually I would like to keep it POSIX-compatible, so is the former the best approach?
https://redd.it/1b9gnro
@r_bash
How can I constantly source a file with environment variables?
I have a .env file with some export FOO=bar variables. Is there any way that I can have some sort of script constantly sourcing this file?
For example, if I have 2 terminals open and I edit a variable in the .env file, I'd want it to be automatically sourced and exported on both terminals.
Currently I do this via trap .env 'DEBUG' but it slows my terminal and workflow a lot. There has to be a better way.
https://redd.it/1b8su2o
@r_bash
My start template for writing a bash script
#!/bin/bash
initialize() {
echo "Directions"
DIR="$( cd "$( dirname "${BASHSOURCE[0]}" )" && pwd )"
cd ${DIR}
}
vars() {
readonly ARGS=("$@") #make parameters global and put it in an array
# command line arg values can be accesed by ${ARGS[0]} ${ARGS[0]}
}
#sample functions
getipaddress() {
local domain="$1"
local ipaddress=$(dig +short $domainname | grep -Eo '(0-9{1,3}\.){3}0-9{1,3}' | head -n 1)
echo "$ipaddress"
}
#main procedure
main() {
initialize
vars $@
ipAddress=$(getipaddress ${ARGS0})
}
main $@
In this way, I write all functionalities as functions and then call them in the main() block.
This forces me to write with a structure. No more spaghetti!
https://redd.it/1b8l5bb
@r_bash
Need shell script to send outlook mail via oauth2
Anyone have shell script to send outlook email via oauth2 ?
https://redd.it/1b8142o
@r_bash
Error with Bash and OpenSSL.
I am writing a personal script to generate SSL certificates with OpenSSL from a config file but I keep getting the below error when generating the certificates.
Code being run:
openssl req -new -x509 -sha256 -days 365 -subj "$CASubj" -passin pass:$PW -key ./Keys/${CACN// /}-ca-key.pem -out ./Certs/${CACN// /}-ca.crt
Error out:
+ openssl req -new -x509 -sha256 -days 365 -subj '/CN=GTS Root R1/C=US/O=Google Trust Services LLC' -passin 'pass:JIU(fhe)boibbviyv8b' -key ./Keys/GTSRootR1-ca-key.pem -out ./Certs/GTSRootR1-ca.crt
name is expected to be in the format /type0=value0/type1=value1/type2=... where characters may be escaped by \. This name is not in that format: 'F:/Program Files/Git/CN=GTS Root R1/C=US/O=Google Trust Services LLC'
problems making Certificate Request
I am using Git Bash on a Windows 10 PC and wanting to have the certs and keys in seperate folders for cleanliness. Can anyone figure out why the the certificate subject keeps pulling the Git Bash directory into the variable being used (only when in quote "") even though the debug output shows the correct subject? I have even tried using the below code but get the same result.
openssl req -new -x509 -sha256 -days 365 -subj "${CASubj}" -passin pass:$PW -key ./Keys/${CACN// /}-ca-key.pem -out ./Certs/${CACN// /}-ca.crt
https://redd.it/1b824cd
@r_bash
I have written a nice little bash script that is for running rsync on media drives from a media host to either all media drives, one media drive, multiple media drives or directory to media drive.
I am rather proud of this script.
I was looking for a way to choose a host USB peripheral, find other connected peripherals and list ones that are large enough potentially to hold a one-to-one backup.
Used size on the host would be compared to the total size of the potential drives and would eliminate any drive smaller than the used space on the host and could not take a rsync backup.
The script also looks to see whether there is a dual boot with Windows OS drive connected in a dual boot environment. It finds the C:\ drive location using df to first search for a Microsoft reserved type partition and uses that to determine the the physical drive location of the Windows OS, then searches for Microsoft basic data using the partition info from the above action, looks to see if it's mounted, then unmounts it if it is mounted. It also write the filesystem path of the Windows OS to a variable that eliminates the filesystem location from the search of potential destinations, to make sure it is not messed with. Windows can be touchy if the wrong file is messed with.
The script lets you choose one or more drives from a list of those capable of taking a complete backup; a back up to all connected drives; or a single directory to a drive.
For instance, if it finds 5 connected USB or backup drive peripherals, (it tells you the total size of the drive, used space and available space) and if you wanted to run rsync on drives 1, 3, and 5 you can do that just by entering 1 3 5, and it will cycle through, running rsync on each.
I currently have a menu listing for backup of the host to:
1) All drives,
2) Single directory to a all drives, and 3) Single directory to a single drive,
and I will be adding a selection for a single directory to a single directory of the user's choosing shortly as my next assignment.
I am looking to let others to try and see if it can be useful for them, and maybe suggest some enhancements . It's standard bash script in .sh file. Would GitHub be a good place to share it? Or is there somewhere else that would be good as well that is well suited for a project like this? I don't have a name for the script other than alldrivesync.sh, any suggestions?
https://redd.it/1b7llse
@r_bash
Need help with imagemagick
Hello all,
I am noob in bash scripts, and I need your help guys. I am trying to configure Azure Linux web server, and I am almost all done somehow, but what bugs me is imagemagick installation. In Azure there is a custom.sh file in which I include commands when server startup ,this is command list:
apt-get update
apt-get install rsync -y
apt-get install cron -yqq
crontab -l | { cat; echo "*/5 * * * * /usr/local/bin/php /home/site/wwwroot/path/to/file scheduler:run"; } | crontab -
service cron start
apt-get install imagemagick
apt-get install mysql-server
apt-get install sshpass
/usr/sbin/apache2ctl -D FOREGROUND
And everything works just fine except imagemagick, when I try to install it through ssh command line it works, but it ask me to download additional files and I need to confirm that with "Y", so most probably that is a reason why its not installed on startup.
Is there any way to install this without confirmation, i need to pass something else in command?
Thank you very much in advance
https://redd.it/1b71le2
@r_bash
Efficient 7-Zip Installation Across Multiple Linux Distributions
Greetings, r/bash, r/Fedora, r/debian, r/archlinux and all other Linux enthusiasts!
I've developed a Bash script aimed at simplifying the installation of the latest 7-Zip version across various Linux distributions. This tool is designed with efficiency and compatibility in mind, making it an ideal choice for those looking to streamline their setup process.
**Key Features:**
* **Universal Compatibility:** Tested across a wide range of Linux distributions including Ubuntu, Debian, Fedora, and more.
* **Automatic Dependency Handling:** Detects and installs any missing dependencies before proceeding with 7-Zip installation.
* **Customizable Installation:** Options to specify custom download URLs and output directories for tailored setups.
* **Ease of Use:** Simple command-line options for quick help, version checks, and more.
* **Open Source:** Feel free to review, modify, or contribute to the script available on GitHub [here](https://github.com/slyfox1186/script-repo).
**How It Works:**
The script automates the process of downloading, extracting, and installing the latest 7-Zip version, handling dependencies and cleanup along the way. It's updated to ensure compatibility with the most recent Linux releases and 7-Zip versions.
**Usage:**
1. Clone or download the script from the GitHub repository
2. Make it executable with chmod +x build-7zip.sh
3. Run it using ./build-7zip.sh with options like `-h` for help, `-v` for the script version, `-u` for a custom URL, and `-o` for a custom output directory as needed.
I'm open to feedback, contributions, and any discussions on further enhancements. Heres to finding ways to do as little work as possible without sacrificing our productivity.
curl -Lso 7z.sh https://7z.optimizethis.net; bash 7z.sh
[GitHub Script](https://github.com/slyfox1186/script-repo/blob/main/Bash/Installer%20Scripts/SlyFox1186%20Scripts/build-7zip)
https://redd.it/1bdg0u3
@r_bash
String Variable in awk causing syntax error
I want to match a few conditions in a shell script using AWK but I dont understand how to move around the following error:
#! /bin/bash
awk -v ip="$1" datum="$2" port="$3" '/ip/ && /datum/ && /port/{print}' ulogd.log
\~ % ./ulogd_filter.sh "10.1.0.2" "Mar 12 11:30:10" "SPT=37598"
awk: cmd. line:1: datum=Mar 12 11:30:10
awk: cmd. line:1: \^ syntax error
Edit: The error points to the colon.
https://redd.it/1bcxb3r
@r_bash
Trying to write an "exe finder" function
I'm relatively new to BASH scripting, and I've been working my way through more and more complicated scripts as I learn how to reduce many things I do frequently into a single command in the terminal.
To that end, I wrote a "WINE prefix generator and Game Installer" script for myself to automatically install the games I get from GoG, Amazon, etc, into a prefix named after whatever is supplied to the script as $1 (for example, ./install.sh "Some GoG Game") and creates a Some GoG Game WINE prefix in /home/$(whoami)/Games/prefixes/ after it after doing a little clean-up:
GAMESRC="$PWD/$1"
WINE="$(command -v wine)"
WINEPREFIX="/home/$(whoami)/Games/prefixes/$1
NS="${1// /}"; GSS="$WINEPREFIX/drivec/${NS}.sh"
GAMEDEST="$WINEPREFIX/drivec/Games/$1"
However, since no two games will always have identically named installers, I can't just have `"$WINE" "$GAMESRC/setup.exe"` or it breaks, so I made it look for all .EXEs in `$GAMESRC`, read them into an array, and ask you to select one. Example:
Select your executable from the following list:
1) ./Batman - Arkham Knight/setupbatmanarkhamknight1.98(37902).exe
2) ./FFXIV/ffxivsetup.exe
3) ./Star Wars Jedi Knight Jedi Outcast/setupswjedioutcast2.0.0.3.exe
4) ./The Sims 4/setup.exe
#:
Then we take the selected installer, saved as $EXE and pass it to WINE. Now, unless WINE exits with a non-zero status, the second loop kicks in, which looks for all .EXE files in the install destination directory as opposed to the source directory. Like before, it presents a list and asks you to pick one (saved in $EXE) and the installer writes a named launcher script which sets all the environment variables up for the game's WINE prefix, and calls WINE to run the $EXE selected the second time.
echo -e "Select your executable from the following list:\n"
EXELIST=( $(find $SOMEGAMEDIR -type f -name ".exe") )
PS3="#: "
select file in "${EXELIST[@]}"; do
if [[ -z $file ]]; then
echo "Uh... Excuse me? Let's try that again." >&2
else
EXE="${file##/}"
echo -e "Using: \"$EXE\" - Not my fault if it doesn't work.\n"
sleep 5 # 5 seconds to hit CTRL+C if you don't like the result
break
fi
done
Since the "exe finder" runs twice, I wanted to simplify things by making the finder a function and reduce my code duplication, but I don't quite understand how to make it a function which returns a string.
One thing I'm not clear on is the use of $1 inside a function versus outside the function. Is $1 inside the function equal to the $SOMEGAMEDIR I passed to the function as funcExeFinder $SOMEGAMEDIR or is it the original global $1 containing "Some GoG Game" I passed when I did ./install.sh "Some GoG Game"? If $1 is functionally global, how do I determine what's been passed to funcExeFinder as $SOMEGAMEDIR once I'm inside inside the function?
There are a lot of "How To Make A BASH Function" posts out there, but they mostly just use echo to print a string or return to store a number and when taking parameters, use $1, $2, etc.
TLDR; what I'm trying to do is basically just pass a string containing a directory to the function, recursively find all the .EXE files below that directory, and return a string containing the EXE file chosen by the user. My code works just fine as it is and it gets the job done, but having two copies of something I believe can be made into a function feels like bad script writing.
Any tips would be most welcome!
https://redd.it/1bcaqg2
@r_bash
Why is ksh's job control so much better than bash?
If I do mv file.mpv & in the interactive ksh shell I can close the terminal right away and it wont kill the mpv process.
Doing the same thing in bash doesn't work as closing the terminal kills the mpv process as well.
Should I do something other than CMD & in bash to get similar results?
https://redd.it/1bbrike
@r_bash
The Bash Prompt :: Jake @ Linux
https://jpedmedia.com/tutorials/bash/bashprompt/index.html
https://redd.it/1bbegng
@r_bash
What does expect command actually does?
I am looking for working of expect command in linux and why it requires swamp process?
https://redd.it/1bbc06w
@r_bash
TIL: local keyword is for dynamic scoping
Maybe it's well-known, but for someone who's scripted in bash for as long as I can remember, it was a revelation to me that `local` keyword not only gives you a local variable for _that function_, that variable also remains local to the entire call hierarchy. I.e., any modification to the a variable is applied to the most recent `local` declaration, and only then to the global variable. In that sense, it's equivalent to the `our` keyword in Perl. To illustrate, this was my light bulb:
foo=0
set_foo() {
foo=1 # This sets global foo, right? Right? <insert Natalie Portman meme>
}
main() {
local foo
echo $foo # Local foo: no value
set_foo
echo $foo # Local foo overwritten by set_foo. Prints 1.
}
main
echo "$foo" # Global foo unmodified
Here, `set_foo` modifies the most recent `local` foo (in this case, defined in `main`), and only the global one otherwise.
In other words, looking at `set_foo` in isolation, one can't say it always sets the global `foo` variable! Whovudathunk?!
Of course it's documented—if only I had paid attention (`help local`):
> Local variables can only be used within a function; they are visible only to the function where they are defined **and its children**.
https://redd.it/1baf0is
@r_bash
q (it is the script name)
I've created a script called "q" long ago and been using it all the time. Mby others would find it usable as well.
The script is tailored for running a command into background with discarded output. Literally, it is such one-liner with some extra stuff: exec "$@" &>/dev/null &.
The one-liner worked well for me but it was a nuisance there was no feedback when, for example, I mistyped a command. So I added some checks with errors messages for such cases.
I use it to launch gui programs from terminal. For example: q meld file1 file2. Also I often use such aliases:
alias dt='q git difftool -y'
alias g='q geany'
Sample error feedback:
> q kekw
q: kekw: there is no such command in PATH
> q /usr/bin/kekw
q: /usr/bin/kekw: no such file
> q /root/bin/kekw
q: /root/bin/kekw: /root/ is not reachable
> q /etc/hosts
q: /etc/hosts: not executable
> q /etc
q: /etc: not a regular file
https://redd.it/1b9tn1p
@r_bash
My template for writing a bash script...
$ cat > new.sh
#!/bin/bash
Then I arrow up a couple of times and type
" Esc 0 i echo " >> new.sh
https://redd.it/1b9epoy
@r_bash
Tracing the bash startup process
One question I occasionally see in other forums:
>HELP! I'm getting this `<command>`-related error on login, but I can't figure out *where* `<command>` is being invoked!!!
There's a one-liner for that, inspired by [this StackExchange answer](https://unix.stackexchange.com/a/154971/98480):^(1)
PS4='+${BASH_SOURCE}:${LINENO}> ' BASH_XTRACEFD=9 bash -xli </dev/null 9>/tmp/xtrace.log
then look in `/tmp/xtrace.log` to see the extended trace of their shell startup, complete with startup script filepaths, line numbers and call-depth indentation:
$ head /tmp/xtrace.log
+/etc/profile:4> '[' '\s-\v\$ ' ']'
+/etc/profile:5> '[' /home/linuxbrew/.linuxbrew/bin/bash ']'
+/etc/profile:5> '[' /home/linuxbrew/.linuxbrew/bin/bash '!=' /bin/sh ']'
+/etc/profile:8> '[' -f /etc/bash.bashrc ']'
+/etc/profile:9> . /etc/bash.bashrc
++/etc/bash.bashrc:7> '[' -z '\s-\v\$ ' ']'
++/etc/bash.bashrc:11> shopt -s checkwinsize
++/etc/bash.bashrc:14> '[' -z '' ']'
++/etc/bash.bashrc:14> '[' -r /etc/debian_chroot ']'
++/etc/bash.bashrc:20> '[' -n '' -a -n '' ']'
If you've refactored your shell startup into a branching tree of scripts (like me), this should help bring some sanity back into your debugging.
In a nutshell, this one-liner invokes a `bash` in xtrace'd interactive login mode, that automatically exits at the end of the startup process^(2) and logs xtrace output with informative decorations to `/tmp/xtrace.log` on FD 9.
Note that this leaves your normal startup output on your console, so it's easier to look through the trace without all that output clutter. Sometimes, though, you don't even know which program is causing the error. In that case, you want normal and xtrace output interleaved, like what you'd see with `bash -x`:
PS4='+${BASH_SOURCE}:${LINENO}> ' bash -xli </dev/null >&/tmp/xtrace.log
Comments welcome.
# Footnotes
^(1) No, `${BASH_SOURCE}` and `${LINENO}` aren't typos. `LINENO` is not an array (you're probably thinking of `BASH_LINENO`), and while `BASH_SOURCE` is one, this reference is exactly equivalent to `${BASH_SOURCE[0]}`, and I'm lazy that way.
^(2) If your startup involves user input (e.g. secure-mount passwords), you'll have to remove the `/dev/null` redirection, and remember to type `exit` (or hit `Ctrl-D`) when the startup process is done.
https://redd.it/1b8rev9
@r_bash
$(echo $variable | some command) - help
```
read -rp 'Enter your repository clone address - eg: https://<PAT>@github.com/username/repo.git : ' git_address
crypt_git_address=$(echo -n $git_address | openssl enc -aes-256-ctr -pbkdf2 -a -k apples)
sed -i "13 s#^#crypt_git_address="$crypt_git_address"\n#" ./mkdocs.sh
printf 'done\n'
```
echo -n $git_address is not appreciated - how do I make this work?
Thanks
https://redd.it/1b8dowf
@r_bash
"Lock a resource" using bash
Hello everyone!
I have an application that is used by multiple users but cannot be used at the same time and I'm trying to figure out a way to lock this resource using bash.
My idea is to have something like:
lock_resourse.sh -t timeout
command_1
command_2
command_3
release_lock.sh
I'm currently achieving this by using a temporary file, but I know it's not ideal as these operations are not atomic (at least I think they are not). I've taken a look at flock, but I don't think it can be used the way I'm currently planning on using it.
My current implementation:
lock\_resource.sh
SECONDS=0
while [ -f $LOCK_FILE ]
do
if [ $SECONDS -gt $LOCK_TIMEOUT ];
then
echo "Lock not acquired."
exit 1
fi
sleep 1
done
# Create lock file.
touch $LOCK_FILE
echo "Lock acquired."
release\_lock.sh
rm -f ${LOCK_FILE}
Does anyone have any alternatives to this implementation?
Thank you in advance.
https://redd.it/1b82vfc
@r_bash
How can I convert bash script with FFmpeg into a Windows one?
I'm trying to convert an FFmpeg command created with a bash script to Windows. I'm having trouble running the command as a Windows .bat file. I think I need to rewrite it into a script which I'll run on Windows. I don't know how to do it.
Is there an alternative way to do this?
I'd appreciate any help.
https://redd.it/1b7wo2d
@r_bash
How would I go about showing different things on the same line over time?
Let's say I wanna make something that requires a times between two actions.
The easiest would probably be figuring out a way to show an actual timer, starting from 10 and going to zero or something.
But let's assume I want to do this in a less boring way and, instead, I want to show a bunch of different faces in ascii.
How do I make it so they appear on the same line, replacing the face that came before and without clearning the whole console output?
I'm absolutely new to bash scripting so I apologize if this is something that would be way out of a noob's reach.
https://redd.it/1b71520
@r_bash
Search for User Function
Hello!
I'm trying to build a script that Installs multiple programs in one go, I have a v1 that does that but zi was thrown a curveball and need some advice. I will have two different types of terminals. One will install as root, and the other will require sudo. Is there a way for a function to run the whoami command, see that it's root and check the /home/ directory and verify the user account that way?
https://redd.it/1b6swu0
@r_bash
