Recent questions tagged Linux

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linux - How do I syntax check a Bash script without running it?

Is it possible to check a bash script syntax without executing it? Using Perl, I can run perl -c ' ... equivalent command for bash scripts? See Question&Answers more detail:os...

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

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linux - MySQL fails on: mysql "ERROR 1524 (HY000): Plugin 'auth_socket' is not loaded"

My local environment is: fresh Ubuntu 16.04 with PHP 7 with installed MySQL 5.7 sudo apt-get install mysql-common ... somehow got to 1) again. See Question&Answers more detail:os...

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

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linux - How to Free Inode Usage?

I have a disk drive where the inode usage is 100% (using df -i command). However after deleting files ... reduce the used inode count? See Question&Answers more detail:os...

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

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584 views

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linux - What is the difference between "#!/usr/bin/env bash" and "#!/usr/bin/bash"?

In the header of a Bash script, what's the difference between those two statements: #!/usr/bin/env bash ... environment What does it mean? See Question&Answers more detail:os...

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

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linux - How to run a shell script on a Unix console or Mac terminal?

I know it, forget it and relearn it again. Time to write it down. See Question&Answers more detail:os...

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

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506 views

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linux - Can _start be the thumb function?

Help me please with gnu assembler for arm926ejs cpu. I try to build a simple program(test.S): .global _start ... or It is always arm func? See Question&Answers more detail:os...

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

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377 views

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linux - How to include needed C library using gcc?

I am trying to compile the simple C example from this Tutorial on Ubuntu using gcc. What do I have to ... <libappindicator/app-indicator.h>? See Question&Answers more detail:os...

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

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linux - why C clock() returns 0

I've got something like this: clock_t start, end; start=clock(); something_else(); end=clock(); printf(" ... 2011 x86_64 x86_64 x86_64 GNU/Linux See Question&Answers more detail:os...

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

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linux - Is garbage allowed in high bits of parameter and return value registers in x86-64 SysV ABI?

The x86-64 SysV ABI specifies, among other things, how function parameters are passed in registers (first argument ... much open to debate. See Question&Answers more detail:os...

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

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linux - When using os.execlp, why `python` needs `python` as argv[0]

The code is like this: os.execlp('python', 'python', 'child.py', #other args#) # this works os.execlp( ... as the second parameter of os.execlp? See Question&Answers more detail:os...

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

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539 views

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linux - How to create a temporary directory in C++?

I'm writing a function in C++ which creates a temporary directory. Such function should be as most portable as ... . How do I achieve that? See Question&Answers more detail:os...

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

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634 views

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linux - Linking 32-bit library to 64-bit program

I have a 32-bit .so binary-only library and I have to generate 64-bit program that uses it. Is there a way ... can be used with 64-bit program? See Question&Answers more detail:os...

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

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538 views

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linux - How do i read single character input from keyboard using nasm (assembly) under ubuntu?

I'm using nasm under ubuntu. By the way i need to get single input character from user's keyboard (like ... over come this segmentation fault. See Question&Answers more detail:os...

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

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373 views

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linux - How does vi restore terminal content after quitting it?

How does a program like vi or man or any other program replace the terminal content with the program's own ... back the old terminal content? See Question&Answers more detail:os...

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

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401 views

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linux - Accessing a mysql database from external host/ip? (ie: mysql workbench)

I have a mysql server running on x.x.x.x, and can access it internally no problem (of course). ... fundamental security issue I am missing? See Question&Answers more detail:os...

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

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338 views

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linux - Error on execution -version `Qt_5' not found required by

On execution of eiskaltdc++ on ubuntu 15.10 ,I get the following error: eiskaltdcpp-qt: /usr/lib/x86_64-linux ... a solution.Thanks in advance. See Question&Answers more detail:os...

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

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739 views

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linux - MongoDB Failing to Start - ***aborting after fassert() failure

I am new to Ubuntu (Linux tbh). I encountered problem with starting MongoDB service. I want to created web ... wrong or its different issue? See Question&Answers more detail:os...

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

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449 views

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linux - Relinking an anonymous (unlinked but open) file

In Unix, it's possible to create a handle to an anonymous file by, e.g., creating and opening it with ... in the disk's directory structure. See Question&Answers more detail:os...

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

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480 views

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linux - In bash, how to store a return value in a variable?

I know some very basic commands in Linux and am trying to write some scripts. I have written a function which ... the screen? Thanks in advance. See Question&Answers more detail:os...

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

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484 views

1 answer

linux - how to find the owner of a file or directory in python

I need a function or method in Python to find the owner of a file or directory. The function should be ... ("/home/somedir/somefile") owner3 See Question&Answers more detail:os...

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

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408 views

1 answer

linux - Force another program's standard output to be unbuffered using Python

A python script is controlling an external application on Linux, passing in input via a pipe to the external ... module to achieve this? See Question&Answers more detail:os...

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

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429 views

1 answer

linux - How to add poll function to the kernel module code?

As I know, to inform the user space from kernel space, one way is to using poll. That means kernel driver ... some times, but still failed. See Question&Answers more detail:os...

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

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555 views

1 answer

linux - Code for parsing a key/value in in file from shell script

I have a file that I need to look up a value by key using a shell script. The file looks like ... everything following whitespace after the key. See Question&Answers more detail:os...

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

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585 views

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linux - Using grep to get the next WORD after a match in each line

I want to get the "GET" queries from my server logs. For example, this is the server log 1.0.0.127.in- ... there any way this could be done? See Question&Answers more detail:os...

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

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338 views

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linux - Is it OK to use the same input file as output of a piped command?

Consider something like: cat file | command > file Is this good practice? Could this overwrite the input file as the same ... t} && mv ${t} 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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505 views

1 answer

linux - Escape filenames the same way Bash does it

When I use the "tab" key in bash (when you have started to type the filename and you want it to complete) ... same way "tab" escapes filenames. See Question&Answers more detail:os...

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

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635 views

1 answer

linux - Why can't I use Unix Nohup with Bash For-loop?

For example this line fails: $ nohup for i in mydir/*.fasta; do ./myscript.sh "$i"; done > output.txt& -bash: ... What's the right way to do 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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526 views

1 answer

linux - PHP exec - check if enabled or disabled

Is there a way to check in a php script if exec() is enabled or disabled on a server? See Question&Answers more detail:os...

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

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