Recent questions tagged shell

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shell - Execute a command on remote hosts via ssh from inside a bash script

I wrote a bash script which is supposed to read usernames and IP addresses from a file and execute a command on them ... and how can i fix it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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890 views

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shell - Prevent bash from adding single quotes to variable output

Problem: I'm writing a script that performs several HTTP requests with curl and I want to add the headers to a ... /www.example.org + set +x See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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755 views

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shell - Restore default working dir if bat file is terminated abruptly

I have a scenario where during execution of a batch file, it navigates to a different folder (say to "../asdf") ... CMD etc can be done there. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - How can I view only the first n lines of the file?

I tried head +10 and it didn't work. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - How to run SWI-Prolog from the command line?

Is there a way to just create a prolog script called hello.pl like this: #!/usr/local/bin/swipl -q ... install swi-prolog --with-libarchive See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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957 views

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shell - PHP - How to know if server allows shell_exec

On some servers, PHP is not allowed to run shell commands via shell_exec. How can I detect if current ... shell commands execution via PHP? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Remove ANSI color codes from a text file using bash

I have a bash script that runs and outputs to a text file however the colour codes it uses are also included ... be left with Hello and User See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - What's the difference between $@ and $* in UNIX?

What's the difference between $@ and $* in UNIX? When echoed in a script, they both seem to produce the same output. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Bash scripting unexpected operator

I'm writing script for git hook and have trouble with if statement inside while. File: #!/bin/sh while read ... kind of error is here? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Ask a running bash (interactive) to run a command from outside

I have a terminal (xterm) open with bash running in it, showing a prompt. Suppose I know this running bash's ... receive it as a user input. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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863 views

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shell - Replace substring with sed

I have a string like this : test:blabla And with sed, I want to replace what's after the ':' with ... didn't found anything. Any help ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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845 views

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shell - Bash: trick program into thinking stdout is an interactive terminal

I want to run a program's output through a pipe, but it apparently behaves differently when it detects ... it would in regular circumstances? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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837 views

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shell - How to select a particular column in linux df command

I am trying to collect information on the amount of space left on different servers. So when I execute df -k ... data from a particular column. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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804 views

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shell - How to check if the file is a binary file and read all the files which are not?

How can I know if a file is a binary file? For example, compiled c file. I want to read all files from ... , but I want ignore binary files. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - android enable disable bluetooth via command line

I am trying to enable disable bluetooth on android device using command line. I can enable it using adb shell ... won't be device independent. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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shell - How to include nohup inside a bash script?

I have a large script called mandacalc which I want to always run with the nohup command. If I call it from ... used inside the script. cheers. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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866 views

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shell - Where to view man pages for Bash builtin commands?

For example, when I type man fg, or man history, the same manpage, BUILTIN(1) will be displayed. There is a ... usage. Where can I find them? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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947 views

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shell - redirect command output into variable and standard output in ksh

I have some shell command. I would like to write the output to the standard output and save it into variable ... are two commands Any idea? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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shell - Read file into String and do a loop in Expect Script

What I am trying to do is to: Create a .exp file, which will read from the *.txt file from the same ... " Any help is greatly appreciated.... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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957 views

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shell - Capture the output of Perl's 'system()'

I need to run a shell command with system() in Perl. For example, system('ls') The system call will ... future processing with my Perl code. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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880 views

1 answer

shell - Use current filename ("{}") multiple times in "find -exec"?

Many sources say that every instance of {} will be replaced with the filename found through find, but when I ... filename of each found file. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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800 views

1 answer

shell - What is the difference between an inline variable assignment and a regular one in Bash?

What is the difference between: prompt$ TSAN_OPTIONS="suppressions=/somewhere/file" ./myprogram and prompt$ TSAN_OPTIONS=" ... my first... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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765 views

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shell - read stdin in function in bash script

I have some set of bash functions which output some information: find-modelname-in-epson-ppds find-modelname-in- ... the best bash practices? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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919 views

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shell - How to cut a string after a specific character in unix

So I have this string: [email protected]:/home/some/directory/file I just want to extract the directory ... doesn't have a fixed length. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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984 views

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shell - Appropriate hashbang for Node.js scripts

I'm trying to create a script for node.js that will work in multiple environments. Particularly for me, I'm ... in either case for node.js? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

1 answer

shell - Sending and receiving SMS by command line with Huawei E3131 and HiLink on a debian system

I long time searched the internet for a guide how to send sms by command line with Huawei E3131 and HiLink ... on a headless system on superuser See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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788 views

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shell - Accessing bash completions for specific commands programmatically

I'm trying to write a small command launcher application, and would like to use bash's tab completions in my ... completions in my own app.] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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823 views

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shell - IO Redirection - Swapping stdout and stderr

Given a shell script: #!/bin/sh echo "I'm stdout"; echo "I'm stderr" >&2; Is there a way to call that ... doesn't work. I'm out of ideas! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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