New answers tagged bash
0
votes
how to fix the weird error “Operation not permitted”
I saw a similar (and puzzling) error. Turned out to be fapolicyd - yet another service for restricting access. No warnings anywhere (by default).
Try stopping the service, to see if it solves your ...
0
votes
How can I find the RFC file that covers a particular topic?
You can use the grep command with the -r (recursive) and -z (decompress) options for a more efficient search. Here's an alternative approach:
findrfc() {
zgrep -i "$1" /usr/share/doc/rfc/*....
0
votes
Loop over a range of numbers to download with wget
Start multiple downloads in parallel:
url="example.com"
for i in {001..100}
do
wget --timestamping --continue --no-verbose "${url}/imageID=$i" &
done
wait
Plese note the &...
- 101
1
vote
bash autocomplete custom script with possiblities from a text file
I figured out a working solution:
_run_remote_completion() {
local cur_word="${COMP_WORDS[COMP_CWORD]}"
local hosts=$(cat ~/data/remote_hosts.txt)
COMPREPLY=($(compgen -W "$hosts&...
3
votes
Accepted
In which cases outputs of basename "$x" and echo "${x##*/}" differ?
The specification of basename includes the following:
SYNOPSIS
basename string [suffix]
DESCRIPTION
The string operand shall be treated as a pathname […]. The string string shall be converted to the ...
- 75.7k
2
votes
How to add a path to PATH variable in linux alpine for the entire machine?
Alpine uses Ash and from the ash(1) man page:
Therefore, a user should place commands to be executed only at login time in the .profile file, and commands that are executed for every shell inside the ...
1
vote
How to run sendmail as another other user?
Why are the above returning different results to executing the commands separately on the command line
Because su doesn't actually switch your shell to a different user – it starts a new shell under ...
- 465k
1
vote
change bash shortcut keys such as Ctrl-C?
Here's the steps summarized:
Go to terminal settings, change Copy from ctrl+shift+C to simply ctrl+c
Done.
Use ctrl+shift+C in the terminal if you need to abort a program.
And that without the need ...
- 111
0
votes
0
votes
how do I format the wildcard inside the BOOLEAN expression so that it tests for all extensions?
[[ is not a normal command and words in its argument list don't have pathname expansion aka globbing applied to them. [/test with an unquoted wildcard would do the expansion but could uncontrollably ...
- 3,778
0
votes
How to Preend or Append File Name to Reflect Number of Pages in PDF using "qpdf" and "perl"
I was unable to find a solution using sed; however, I found a solution using Perl. There were two problems I identified. The first was related to my regex. Namely, the second grouping wasn't working ...
- 1,045
1
vote
How can I cancel reverse search without losing text typed?
You might want to look into a slightly different behaviour when using reverse search. If you start typing a command, and then press Ctrl+R but don't find the previously typed command, then pressing ...
- 36
0
votes
Error when using apt install in Ubuntu shell of Windows 10
That type of error can occur when the Package Manager's repository cache has not been updated recently. Give sudo apt update a go which should fix it. If not, it could either be a broken apt sources ...
2
votes
Accepted
Using sed to edit filepath variable
In your question, you have the following.
sed -i "s|${filepath}/${correctfilepath}|g" $Dir/.git/config.
In this command, the delimiter | only appears twice. I believe the delimiter needs to ...
- 1,036
0
votes
Accepted
Desktop shortcut with a command line argument which contains filename with random numbers
That line seems to work fine directly in a terminal window, but not when i'm trying to launch the desktop shortcut.
This is because in a terminal window you interact with a shell that interprets this ...
- 75.7k
1
vote
How can I change values of the `.ini` files via command line? (linux or windows)
This question is 5 years old and despite YAML having mostly replaced INI as the dominant config file format, editing INI files is still something you need to do sometimes – in my case to add or update ...
- 111
0
votes
How to transfer a file to a remote host using parallel + ssh?
According to a good tradition, I post my own solution. As usual, afterwards, it often turns out to be not simple, but very simple:
parallel –tagstring {} -q -a file_ip_addr_hosts.csv\
sshpass -p pass ...
0
votes
SSH from A through B to C, using private key on B
You should copy the private key from B to A (change the name of id_rsa)
scp proxy:.ssh/id_rsa ~/.ssh/id_rsa_second
Then you can use
Host proxy
HostName 10.10.10.10
User foo
Port 1234
# ...
- 415
2
votes
How to detect even or odd minutes in bash script
Working with hours or minutes as numbers in bash has a nasty edge case: bash treats numbers with a leading zero as octal, and 08 and 09 are invalid octal numbers:
min=09
echo $(( min % 2 == 0 ))
bash:...
- 26.8k
0
votes
Accepted
exit code segment causes Bash prompt to freak out
You still need to surround each color code with brackets for the same reason, but instead of \[ and \], they have to be \001 \002.
The latter are what the Readline library actually expects, while \[ \]...
- 465k
0
votes
Alias CMD command from WSL2 shell
On my system the alias below does what you want.
First, you should verify how your drive letters are mounted, and that you're able to execute the Windows CMD.EXE from a WSL bash session. I edited /...
- 424
3
votes
Accepted
Does bash support variable substitution in return statement?
Has always been like this, because Variable substitution is not done on a per-statement basis.
It is not return that expands the variable, much like it's not echo that would expand echo $? – all such ...
- 465k
2
votes
Accepted
Provide argument while starting a service using systemctl
Part of systemd's design is that services started from a terminal are subject to exactly the same rules and environment as during system startup (and vice versa) – they can't be directly passed any ...
- 465k
0
votes
Accepted
Font size issue with xterms started through icewm's hotkeys
I don't have a solution, other than in general terms originally stated I don't even know what the problem is. But I have developed a work-around, as follows:
In icewm startup script I added this line
...
- 790
0
votes
Add directory to $PATH if it's not already there
I have these modifications to PATH in my .profile, so it's no good to use the [[ bash-ism.
This does the same thing, but should be POSIXly correct:
prepend_to_PATH () {
local dir
for dir ; do
...
- 459
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