Recent questions tagged Linux

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linux - How to make R use all processors?

I have a quad-core laptop running Windows XP, but looking at Task Manager R only ever seems to use one processor ... and speed up my R programs? 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 do Unix Domain Sockets differentiate between multiple clients?

TCP has the tuple pairs (IP Addr/port/type) to tell one client from another. UDP passes the client IP and ... how to use the domain sockets. 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 execute PHP code from the command line?

I would like to execute a single PHP statement like if(function_exists("my_func")) echo 'function exists'; directly ... . How is it possible? 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 - Unix: How to delete files listed in a file

I have a long text file with list of file masks I want to delete Example: /tmp/aaa.jpg /var/www1/* / ... folders, so no issue with permissions. 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 - Command line: search and replace in all filenames matched by grep

I'm trying to search and replace a string in all files matched by grep: grep -n 'foo' * will give me ... the file by replacing foo with bar. 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 - apache not accepting incoming connections from outside of localhost

I've booted up a CentOS server on rackspace and executed yum install httpd'd. Then services httpd start. ... target prot opt source destination 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 - Unit testing for shell scripts

Pretty much every product I've worked on over the years has involved some level of shell scripts (or batch ... such as CruiseControl or Hudson. 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 test which port MySQL is running on and whether it can be connected to?

I have installed MySQL and even logged in there as a user. But when I try to connect like this: http://localhost: ... way to try it via a url? 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 - Compare integer in bash, unary operator expected

The following code gives [: -ge: unary operator expected when i=0 if [ $i -ge 2 ] then #some code fi why? 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 - rsync copy over only certain types of files using include option

I use the following bash script to copy only files of certain extension(in this case *.sh), however it still ... -include="*.sh" $from $to 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 - How to run Nginx within a Docker container without halting?

I have Nginx installed on a Docker container, and am trying to run it like this: docker run -i -t -p ... Nginx's initial process from exiting. See Question&Answers more detail:os...

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

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646 views

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linux - httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

I tried to restart my Apache server on CentOS 5.0 and got this message: httpd: Could not reliably determine ... message when I restart Apache. See Question&Answers more detail:os...

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

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996 views

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linux - How to encrypt a large file in openssl using public key

How can I encrypt a large file with a public key so that no one other than who has the private key be able ... 1200 bits, no luck, same 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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586 views

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linux - Interpreting segfault messages

What is the correct interpretation of the following segfault messages? segfault at 10 ip 00007f9bebcca90d sp ... .2[7f24b197a000+f6f000] See Question&Answers more detail:os...

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

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454 views

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linux - How can I get `find` to ignore .svn directories?

I often use the find command to search through source code, delete files, whatever. Annoyingly, because Subversion ... for that working copy. See Question&Answers more detail:os...

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

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509 views

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linux - What are libtool's .la file for?

What are libtool's .la files for? How are they used with a shared object? 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 - How to count number of files in each directory?

I am able to list all the directories by find ./ -type d I attempted to list the contents of each ... number of files in each directory? See Question&Answers more detail:os...

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

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493 views

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linux - How to detect the physical connected state of a network cable/connector?

In a Linux environment, I need to detect the physical connected or disconnected state of an RJ45 connector to its ... I guess? Again, 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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509 views

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linux - How to remove all .svn directories from my application directories

One of the missions of an export tool I have in my application, is to clean all .svn directories from my application ... -fr 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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537 views

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linux - How can I exclude directories from grep -R?

I want to traverse all subdirectories, except the "node_modules" directory. See Question&Answers more detail:os...

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

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489 views

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linux - How can I recall the argument of the previous bash command?

Is there a way in Bash to recall the argument of the previous command? I usually do vi file.c followed ... argument of the previous command? See Question&Answers more detail:os...

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

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448 views

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linux - Should PATH contain directories or full paths to binaries?

I am trying to set up a correct PATH, but I'm wondering what it should contain. If I have /usr/bin/ls /usr/ ... so I hope this won't be deleted. See Question&Answers more detail:os...

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

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711 views

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linux - Assembly: printf not printing new line

I have the following code that prints the number of parameters passed to ./main. Notice the fmt in the rodata ... GCC to create my executable. See Question&Answers more detail:os...

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

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530 views

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linux - How to modify the source of Buildroot packages for package development?

I've been using buildroot in order to build a toolchain using uclibc. Now, buildroot downloads all the ... package using existing source? 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 have simple and double quotes in a scripted ssh command

I am writing a small bash script and want to execute the following command via ssh sudo -i mysql -uroot - ... way to solve this 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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642 views

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linux - Delete all files older than 30 days, based on file name as date

I'm new to bash, I have a task to delete all files older than 30 days, I can figure this out based on the ... > 30 day from now: delete 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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629 views

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linux - Using python 32 bit in 64bit platform

In RHEL7, I have a Python 2.7.11 64bit. I need to run 32 bit Python applications. How do I change the ... run 32 bit rather than 64 bit? See Question&Answers more detail:os...

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

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580 views

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linux - Why doesn't the cd command work in my shell program?

When I created my own shell, I am not able to execute cd command which I am able to do in the Linux shell. Why is 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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