Recent questions tagged Linux

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linux - Programmatically get parent pid of another process?

I tried google, but found getppid() which gets the parent pid of the current process. I need something like ... returns the parent process' pid. See Question&Answers more detail:os...

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

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700 views

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linux - Python - Trap all signals

In python 2.6 under Linux, I can use the following to handle a TERM signal: import signal def handleSigTERM(): ... them up one-at-a-time? 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 - understanding and decoding the file mode value from stat function output

I have been trying to understand what exactly is happening in the below mentioned code. But i am not able to ... to underand the logic in here. 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 - What does the '-' (dash) after variable names do here?

if [ -n "${BASH-}" -o -n "${ZSH_VERSION-}" ] ; then hash -r 2>/dev/null fi Where can I find the reference on this? 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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linux - How to debug a C program

I am using Linux, GCC and C. I have a make file. I want to debug my module. I don't want to debug a ... the whole module. How can I 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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572 views

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linux - What's wrong with my lookahead regex in GNU sed?

This is what I'm doing (simplified example): gsed -i -E 's/^(?!foo)(.*)$/bar1/' file.txt ... Invalid preceding regular expression What's wrong? See Question&Answers more detail:os...

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

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544 views

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linux - How to escape a single quote in single quote string in Bash?

I want to display a string in Bash like this I'm a student Of course you can do it like this echo "I ... using single quote around the string ? See Question&Answers more detail:os...

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

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469 views

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linux - How to write data to existing process's STDIN from external process?

I'm seeking for ways to write data to the existing process's STDIN from external processes, and found similar ... "]") from other processes? See Question&Answers more detail:os...

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

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477 views

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linux - php.ini changes but not effective in ubuntu

I want change the limit of php upload file's size And this is some information of my phpinfo. ... show is also: upload_max_filesize 2M See Question&Answers more detail:os...

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

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556 views

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linux - pass stdout as file name for command line util?

I'm working with a command line utility that requires passing the name of a file to write output to, e.g. ... pass stdout as the file argument? See Question&Answers more detail:os...

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

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729 views

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linux - Redirecting command output in docker

I want to do some simple logging for my server which is a small Flask app running in a Docker container. Here ... to a file when using Docker? See Question&Answers more detail:os...

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

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608 views

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linux - Memory usage of current process in C

I need to get the memory usage of the current process in C. Can someone offer a code sample of how to do ... , that would be even more helpful. See Question&Answers more detail:os...

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

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459 views

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linux - How to tell CMake where to put build files?

I want to tell CMake to output files and folders to a different folder instead of the current folder. I'm ... will clarify more what I want. See Question&Answers more detail:os...

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

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466 views

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linux - How do you link to a specific version of a shared library in GCC

I'm compiling some code which uses libcurl on a Debian Linux system. My dev machine is running Debian 5 ... use whatever version is available ? See Question&Answers more detail:os...

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

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507 views

1 answer

linux - Exit code of variable assignment to command substitution in Bash

I am confused about what error code the command will return when executing a variable assignment plainly and with ... it out, thanks 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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565 views

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linux - Is rename() without fsync() safe?

Is it safe to call rename(tmppath, path) without calling fsync(tmppath_fd) first? I want the path to always point ... ) os.rename(tmppath, path) See Question&Answers more detail:os...

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

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365 views

1 answer

linux - Change default Python version from 2.4 to 2.6

I'm wanting to use some newer software that requires Python 2.6, and we currently have both 2.4 and 2.6 ... using 2.6 as the default python? See Question&Answers more detail:os...

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

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3.1k views

1 answer

linux - How can I find out a file's MIME type (Content-Type)?

Is there a way to find out the MIME type (or is it called "Content-Type"?) of a file in a Linux ... " http://www.imageshack.us/upload_api.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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474 views

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linux - C++ Socket Server - Unable to saturate CPU

I've developed a mini HTTP server in C++, using boost::asio, and now I'm load testing it with ... understand what the bottleneck's are/is See Question&Answers more detail:os...

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

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624 views

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linux - How to handle OpenSSL SSL_ERROR_WANT_READ / WANT_WRITE on non-blocking sockets

The OpenSSL library allows to read from an underlying socket with SSL_read and write to it with SSL_write. These ... sits in the mainloop? See Question&Answers more detail:os...

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

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645 views

1 answer

linux - Using WGET to run a cronjob PHP

I tried to do a cron and run a url every 5 mintues. I tried to use WGET however I dont want to download ... run the url and not downlaod 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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528 views

1 answer

linux - Docker in Docker cannot mount volume

I am running a Jenkins cluster where in the Master and Slave, both are running as a Docker containers. The Host ... to Docker in Docker case? See Question&Answers more detail:os...

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

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589 views

1 answer

linux - ROP chain gadget - does jmp cause an issue

As part of a personal project I'm working on a ROP chain, and was looking for a gadget like so; pop ecx; pop ... ? Update: Changed ecx register to esi as i had better gadgets....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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701 views

1 answer

linux - MobaXterm ssh keeps getting disconnected although "SSH keepalive" is set

Environment: Ubuntu 18.04 / MobaXterm personal edition v20.2 build 4296 While connecting with ssh, even though I ... . Usually it just disconnected so my jobs are terminated....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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