New answers tagged scripting
5
votes
setting alias for sourcing a script, to run that script in jenkins with restricted permissions
You have a bash script in /home/user/ and the bash script is myscript you can set an alias to run
/home/user/myscript
#!/bin/bash
echo "WELCOME BASH"
Run chmod +x /home/user/myscript
...
- 2,323
0
votes
Looking for a convenient way to create a "constant array"
Some more approaches:
a=()
repeat 6 a+=18
repeat 9 a+=19
(){a=(${@%.*})} 18.{1..6} 19.{1..9}
- 505k
0
votes
Looking for a convenient way to create a "constant array"
Repeater for any shell:
shuf -rn 5 -e 19
Immediate values can be represented by variables.
- 2,331
0
votes
Looking for a convenient way to create a "constant array"
Here is a way to do this using only zsh expansions:
tl=( ${${:-{1..6}}/*/19} ${${:-{1..9}}/*/18} )
This takes advantage of how zsh performs substitutions with arrays. It creates an array filled with ...
- 396
2
votes
Accepted
Trapping SIGINT so that the process kills itself
In bash, EXIT traps are invoked regardless of the exit cause. In your case, CtrlC causes the SIGINT trap to run, then when the script kills itself, the EXIT trap runs.
As you suspect, the cleanup ...
- 394k
1
vote
How to extract part of URL from curl response in bash script?
You say you want to extract part of the URL but then you continue by saying that you only want part of that stored in a variable.
Extracting part of a value and doing nothing with it doesn't add any ...
- 101k
5
votes
How to extract part of URL from curl response in bash script?
With GNU grep:
$ grep -oP 'https://[^/]+/\d+/\K.*' <<< 'https://www.example.com/1234/text/111?x=999988'
text/111?x=999988
Or
With Perl:
$ perl -nE 'say $& if m@https://[^/]+/\d+/\K.*@' &...
- 29.2k
0
votes
how to pass password as a variable to bash command line without displaying it and show it as *****
If you type a command, what you type remains on the screen. You can, with tput, try to delete the line that is above it.
#!/bin/bash
sleep 5
tput cuu 1
echo "Running: $0 $1 $2 $3 ********* ...
- 3,727
-1
votes
Zsh script to recursively unrar into a folder with the same name
Did you try the unrar itself?
unrar x archive.rar
If the archive has directories and subdirectories - they would be recreated.
- 4,010
1
vote
Accepted
ssh EOF in bash script - how to store value of command?
Fixing up the current way of doing things
ssh $USER@server.com << EOF
cd /data/dev/${ARK_PATH}/
./gradlew bootRun --no-daemon
LATEST_FOLDER=\$(find . -type d -exec stat --printf="%...
- 17k
-1
votes
Bash - while read line fails when ffmpeg executed in while body
Maybe a little late, but the problem with ffmpeg is that it reads from standard input as well, consuming data meant for read in the while-read-loop.
I had some strange timestamp messup. To solve this ...
- 1
0
votes
Accepted
Permission denied with locate command in Shell Script in Oracle Linux?
Remove the dollar sign.
When you write $locate the shell looks for the the variable named "locate" not the executable.
Because you don't have a variable named "locate" you are ...
- 118
0
votes
Change specific settings with gsettings/dconf key. (archlinux, linux-lts-4.19)
You can do it like this:
dconf write /com/gexperts/Tilix/profiles/2b7c4080-0ddd-46c5-8f23-563fd3ba789d/custom-command "'python3 $HOME/.pps/pecan.py'"
Regarding the string in GVariant format,...
- 121
0
votes
how to print first word from a string with multiple words without space?
Assuming none of your file names contain newlines then using any awk:
printf '%s\n' *.AppImage | awk -F'[.]|-[0-9]' '{print $1}'
If they can contain newlines then using GNU awk or any other version ...
- 27.3k
0
votes
how to print first word from a string with multiple words without space?
Using GNU grep:
<INTPUT> | grep -oP '^\D+(?=-\d|\.)'
Using Perl:
<INPUT> | perl -nE 'say $& if /^\D+(?=-\d|\.)/'
Output
Altus
GitHubDesktop-linux
webamp-desktop
YTDownloader
The ...
- 29.2k
2
votes
Accepted
how to print first word from a string with multiple words without space?
Using % to remove suffixes:
for f in *.AppImage; do
f=${f%.AppImage}
echo "${f%%-[0-9]*}"
done
- 1,098
1
vote
how to print first word from a string with multiple words without space?
Using sed (and it's assumed no newline character in the file's name):
printf '%s\n' "$fileName" |
sed -E 's/(-[0-9].*)?\.AppImage//'
- 40.3k
0
votes
Simulating Keystrokes to a Telnet process
This works for me. First, I installed the obsolete telnetd and the associated telnet.
Then I created two FIFOs (one for input to the telnet command and the other for its output) and started the telnet ...
- 101k
1
vote
Accepted
How to add time in my script
It seems to me that the filename (or at least the parts that include the version identifiers) are built up in your second script (marked #shared), on the line:
BUILTBASENAME="${VERSION_DIST}-${...
- 80.1k
0
votes
Linux script for file change email notification ( not inotify or any other utility)
but i have to run it manually
What really matters is how soon you need the email notification. If it doesn't have to be very quick then a cron job would suffice. Either capture the file modification ...
- 4,683
0
votes
Is it bad practice to use sed to pass a variable through to another script?
If you don't want an explicit argument, you may be looking for an environment variable. If one you can use exists, it's in the output of env. Otherwise, you may require your users to set a new one.
...
- 342
0
votes
Accepted
Is it bad practice to use sed to pass a variable through to another script?
If you can rewrite the script to use parameters instead of script modifications - do so.
There are some legitimate or semi-legitimate cases when you want to modify the script:
The script can have too ...
- 4,010
3
votes
Shell script: How to prepend env variable with prefix only if environment variable is defined?
command ${VALUE:+--flag "$VALUE"}
This runs command with the option --flag and its option-argument "$VALUE" if the variable VALUE is defined and non-empty. If the variable is ...
- 312k
3
votes
what are practical uses of stdbuf or nohup?
Let's start with an example without stdbuf. You need 2 terminals because tail -f will block.
Terminal 1
touch log_file1
tail -f log_file1 | cut -d " " -f 1 | uniq
Terminal 2
echo "A 1&...
- 131
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