Questions tagged [bash]
Bash is a free shell for Unix-like operating systems from the GNU Project.
11,778
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Why is GNU wget only returning an index.html.tmp file, instead of the actual files I want?
I want to download a lot of satellite data (organized by each day of each year) in .hdf format from NASA's LAADS DAAC archive. They have a helpful guide that provides a code sample to use with GNU ...
- 21
0
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1
answer
56
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Desktop shortcut with a command line argument which contains filename with random numbers
I'm trying to create a desktop shortcut which launches a terminal app with commandline arguments which contains a path to a file with a randomly generated number in the filename.
I've tried everything ...
- 3
1
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0
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34
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Set background colour in Windows Terminal, with git bash ANSI escape OSC 11 doesn't work
How do I get git bash to set terminal background colour using OSC Ansi Escape sequences?
printf %b '\e]11;rgb:30/00/00\a'
It works when I do it from WSL bash and for some servers when I ssh to them ...
- 51
1
vote
1
answer
45
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SSH from A through B to C, using private key on B
Schematic:
ssh ssh
A ------> B ------> C
^ ^
using A's using B's
ssh key ssh key
Preconditions:
A is running ssh-agent
A can access B
B can access C
A can't ...
- 11
0
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1
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35
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How to detect even or odd minutes in bash script
I need to detect whether the current minutes are even or odd regardless of the time zone. I tried this according to answers from several sites:
#!/bin/bash
n=$(date +"%M")
r=`expr$n%2`
if [ ...
0
votes
1
answer
38
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exit code segment causes Bash prompt to freak out
My Bash prompt (based on mike kasberg's) generally works fine. But when I get an error code, and then write over to the next line, no newline is generated, so the text goes back over my previous ...
1
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0
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29
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How to Identify and Terminate Idle tmux Sessions on a Debian Server
I have a Debian server with multiple tmux sessions running. Some of these sessions are idle and not running any active processes. How can I identify and terminate all tmux sessions that are not ...
1
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1
answer
20
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Does bash support variable substitution in return statement?
Does bash support variable substitution in return statement?
From man bash:
return [n]
Causes a function to stop executing and return the value specified by n to its caller.
Is n allowed to be ...
- 368
2
votes
1
answer
85
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Provide argument while starting a service using systemctl
I have a service installed on an old server and it is started using;
service load-simulator start medium
The value medium acts as a profile of sorts. It can have values like low, medium, high, and ...
- 123
1
vote
1
answer
38
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ssh -t host1 ssh host2 "cat < /tmp/test.txt" – file not found
I'm trying to run cat < /tmp/test.txt on remote host host2 through host1. The file /tmp/test.txt exists on host2. I try:
# locally
ssh -t host1 ssh host2 "cat < /tmp/test.txt"
The ...
- 1,047
3
votes
2
answers
447
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bash see if element inside array is inside a different array
I am trying to test to see if an element inside an array exists. A test case is
array1=(a b c)
array2=(c d e)
for ((i=0; i < ${#array1[@]}; i++)); do
if [[ ${array1[$i]} == "...
- 91
0
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1
answer
24
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Font size issue with xterms started through icewm's hotkeys
Recently got a new laptop with 1920x1080 monitor instead of 1366x768 on old laptop. All my many xterms suddenly smaller and text illegible. After investigation, decided easiest solution was an alias ...
- 790
0
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1
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28
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Dealing with whitespaces in file names after git grep -l
I'm trying to run the script below and I'm struggling with pathspec error when the filename has whitespaces.
I have already read some other posts around here, but since I am not an expert I was not ...
- 103
0
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1
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71
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How to transfer a file to a remote host using parallel + ssh?
I am writing scripts to poll a large number of remote hosts over ssh using gnu parallel. I copy the script to them, run it and get the results. Right now I'm using two bundles parallel + scp to ...
1
vote
1
answer
95
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How to merge all mp3 files located in the same directory?
The command below used to work but stopped around ubuntu/kubuntu 20.04.
ls *.mp3 | sed -e "s/\(.*\)/file '\1'/" | ffmpeg -protocol_whitelist 'file,pipe' -f concat -i - -c copy output.mp3
...
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