Recent questions tagged Linux

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linux - Set max_execution_time in PHP CLI

I know that PHP CLI is usually used because of none time limits and primary because it is not using ... -d max_execution_time=5 script.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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753 views

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linux - bash: silently kill background function process

shell gurus, I have a bash shell script, in which I launch a background function, say foo(), to display a ... I get rid of this message? 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 - "Max open files" for working process

Is it possible to increase "Max open files" parameter for working process ? I mean this parameter: cat /proc ... files Thanks for your advices 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 extract only the raw contents of an ELF section?

I've tried the following, but the resulting file is still an ELF and not purely the section content. $ objcopy - ... can do this? Any 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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linux - Making CMake print commands before executing

I'm working on a large C++ project built with CMake on Linux. CMake runs okay, producing a horde of Makefiles ... 's man page that seem 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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573 views

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linux - Replacing Control Character in sed

I need to replace all occurrences of the control character CTRL+A (SOH/ascii 1) in a text file in linux, how can this be achieved in SED? 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 - Maximum number of concurrent connections on a single port (socket) of Server

What could be the maximum number of concurrent Clients (using different port number) that could communicate to ... telnet in Linux environment. 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 - Uppercasing First Letter of Words Using SED

How do you replace the first letter of a word into Capital letter, e.g. Trouble me Gold rush brides into Trouble Me Gold Rush Brides 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 'bash -c' do?

I followed the following tutorial: http://davidtsadler.com/archives/2012/06/03/how-to-install-magento-on-ubuntu/ At ... did not find it inside. 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 can I monitor the NIC status(up/down) in a C program without polling the kernel?

Now I need to get the status of the NIC(up or down) in the real time. That means I have to catch the ... the C program with a block mode? 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 - Insert multiple lines into a file after specified pattern using shell script

I want to insert multiple lines into a file using shell script. Let us consider my input file contents are: input.txt ... . Can any one help me? 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 there a way to increase BLE advertisement frequency in BlueZ?

I have a linux computer broadcasting a BLE advertisement using the following commands: sudo hciconfig hci0 up sudo ... with command line tools. See Question&Answers more detail:os...

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

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488 views

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linux - Permissions Issue with Laravel on CentOS

I've cloned a laravel repo to my CentOS 7 box. When I try to run it, I get a 500 error with ... not be opened log file permission problem See Question&Answers more detail:os...

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

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622 views

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linux - How to get child process from parent process

Is it possible to get the child process id from parent process id in shell script? I have a file to execute ... the pid of the child process. See Question&Answers more detail:os...

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

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499 views

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linux - Creating temporary files in bash

Are there objectively better ways to create temporary files in bash scripts? I normally just name them whatever comes ... a more careful way? See Question&Answers more detail:os...

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

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619 views

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linux - How pthread_mutex_lock is implemented

I am just curious to know how functions related to synchronization between threads are implemented inside Unix. For ... code would really 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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518 views

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linux - Difference between PID and TID

What is the difference between PID and TID? The standard answer would be that PID is for processes while TID is ... a thread or a process? See Question&Answers more detail:os...

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

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464 views

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linux - Using the "alternate screen" in a bash script

The alternate screen is used by many "user-interactive" terminal applications like vim, htop, screen, alsamixer, less ... script or whatever...) See Question&Answers more detail:os...

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

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516 views

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linux - Finding out what characters a given font supports

How do I extract the list of supported Unicode characters from a TrueType or embedded OpenType font on Linux? Is ... .) provided by the font? See Question&Answers more detail:os...

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

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435 views

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linux - Simple Socket Server in Bash?

Is there a way to quickly bind to a TCP port/ip address and simply print out all information to STDOUT? I have ... an easy way to do 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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675 views

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linux - How do you find out which version of GTK+ is installed on Ubuntu?

I need to determine which version of GTK+ is installed on Ubuntu Man does not seem to 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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590 views

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linux - grep without showing path/file:line

How do you grep and only return the matching line? i.e. The path/filename is omitted from the results. In this case ... -exec grep -Hn FOO {} ; See Question&Answers more detail:os...

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

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629 views

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linux - Negate if condition in bash script

I'm new to bash and I'm stuck at trying to negate the following command: wget -q --tries=10 --timeout=20 - ... ! anywhere doesn't seem to 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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632 views

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linux - How to set system wide umask?

I am working in a lab where we are running Linux (Debian and Ubuntu). Usernames and group names are handled ... access to the common 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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466 views

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linux - How to increase Neo4j's maximum file open limit (ulimit) in Ubuntu?

Currently ulimit -n shows 10000. I want to increase it to 40000. I've edited "/etc/sysctl.conf" and ... maximum open file limits reached error. See Question&Answers more detail:os...

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

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745 views

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linux - os.Mkdir and os.MkdirAll permissions

I'm trying to create a log file at the start of my program. I need to check if a /log directory exists if ... it doesn't seem to work. 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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390 views

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linux - How to set an environment variable only for the duration of the script?

On Linux (Ubuntu 11.04) in bash, is it possible to temporarily set an environment variable that will only be ... , and then launching the 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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686 views

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linux - What is SEGV_MAPERR?

What is SEGV_MAPERR, why does it always come up with SIGSEGV? See Question&Answers more detail:os...

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

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