Recent questions tagged Linux

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linux - insmod error: inserting './hello.ko': -1 Invalid module format"

I have just made my first driver module, the hello world module following LDD3. However unfortunately encountered this ... kernel i am building. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - OpenCV and python/virtualenv?

I'm working on a project in python that uses OpenCV (2.3.1), among other libraries. So far, I just apt ... it can see my opencv python bindings? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Rails: Unable to access log file

I get the following error when restarting my rails app. I've had this problem before, on another server with another ... /log. What's going on? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Generate LLVM C++ API code as backend

The Online LLVM demo page had an option to generate LLVM C++ API code as backend from a source code. However, ... using LLVM/Clang version 3.2. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Strange behaviour of Git: mysterious changes cannot be undone

I am seeing a behaviour in Git which seems very mysterious to me. I keep a clone of the Linux repository ... Thanks for your tips and remarks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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519 views

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linux - Why does ps o/p list the grep process after the pipe?

When I do $ ps -ef | grep cron I get root 1036 1 0 Jul28 ? 00:00:00 cron abc 21025 ... difference between first and second grep executions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How secure is storing password with Git?

I use the Git on my workplace and company policy doesn't allow me to store passwords in unsecure way. Is there ... s not allowed on our server. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Register Variables in Loop in an Ansible Playbook

I have two ansible tasks as follows tasks: - shell: ifconfig -a | sed 's/[ ].*//;/^(lo|)$ ... indexing may result in unexpected outcomes. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to add timestamp while redirecting stdout to file in Bash?

I have a program (server) and I am looking for a way (script) that will redirect (or better duplicate) ... would rather avoid editing its code. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - xvfb-run on OS X

Is it possible to have xvfb-run on OS X? I develop a PHP application which uses xvfb-run. Before I worked on ... use it on both Linux/OS X? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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697 views

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linux - What do the counters in /proc/[pid]/io mean?

I'm creating a plugin for Munin to monitor stats of named processes. One of the sources of information would ... . What do they represent? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - One command to create and change directory

I'm searching for just one command — nothing with && or | — that creates a directory and then ... debian server if that matters. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to convert ".." in path names to absolute name in a bash script?

How to convert the .. in the path names to absolute path names in a bash script. That is, if I have a path ... /nohsib/bop How can I do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to get exit status of a shell command used in GNU Makefile?

I have a makefile rule in while I am executing a linux tool. I need to check the exit status of the tool ... echo "mycommand failed"; false; fi See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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693 views

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linux - Bash: read stdin from file and write stdout to file

I'm trying to run an app (let's say top) so it will read from a file for stdin and write ... something read something echo you said $something See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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561 views

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linux - How can I get position of cursor in terminal?

I know I may save position using tput sc, but how can I read it's position to the variable? I need the ... don't want to use curses/ncurses. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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912 views

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linux - Execute Shell Commands from Program running in WINE

I have a windows program running on Linux using WINE. How can I call Linux shell commands from the windows program? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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720 views

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linux - Python/IPython ImportError: no module named site

I had python 2.7.3 and ipython 1.2 up and running correctly on my Linux system (ubuntu 12.04) but was trying to ... and I'm not sure what to do. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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787 views

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linux - Cron with notify-send

I need to show a notification from a cron job. My crontab is something like: $ crontab -l # m h dom ... . Can anybody help me understand why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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571 views

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linux - Running PHP script from command line as background process

I'm trying to run a PHP script continually in the background via the command line in Linux. I have ... process is terminated. Any suggestions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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502 views

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linux - Increase of virtual memory without increse of VmSize

I searched for my problem in Google and at this site but i still don't understand the solution. I have ... allocated but still not used memory) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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588 views

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linux - Measure page faults from a c program

I am comparing a few system calls where I read/write from/to memory. Is there any API defined to measure page ... to use inside the C program. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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619 views

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linux - Why can't you sleep while holding spinlock?

In the linux kernel, why can't you sleep while holding a spinlock? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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764 views

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linux - Simulate a faulty block device with read errors?

I'm looking for an easier way to test my application against faulty block devices that generate i/o read errors when ... a given set of blocks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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536 views

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linux - What is the use of various Qt platform plugins?

I was doing some cross compiling of a Qt5.2 application for an ARM based target (TI AM335x EVM) and it was ... it was running on embedded linux) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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624 views

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linux - What is the difference between pthread_self() and gettid()? Which one should I use?

I'm trying to set the CPU affinity of threads on Linux. I'd like to know which one of the following ... the scheduling priority of the thread. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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543 views

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linux - Identifying received signal name in Bash

When a signal is received, I can execute some commands using trap. Example: trap 'echo hello world' 1 2 ... /identify the received signal name? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.5k views

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linux - Using curl in a bash script and getting curl: (3) Illegal characters found in URL

So I have a very simple bash script that is curl'ing to an auth server for a header. The header url is ... 0000050: 6166 3331 6232 0d ag11c8. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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