Recent questions tagged Linux

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linux - How to remove cached credentials from Git?

I ran: $ git config credential.helper store And then: $ git push origin master After pushing, I entered my credentials ... . How can I do this? See Question&Answers more detail:os...

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

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1.2k views

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linux - C++ memory allocation mechanism performance comparison (tcmalloc vs. jemalloc)

I have an application which allocates lots of memory and I am considering using a better memory allocation ... performance of these two? See Question&Answers more detail:os...

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

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847 views

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linux - Check if directory mounted with bash

I am using mount -o bind /some/directory/here /foo/bar I want to check /foo/bar though with a bash ... this? CentOS is the operating system. See Question&Answers more detail:os...

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

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535 views

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linux - Import Multiple .sql dump files into mysql database from shell

I have a directory with a bunch of .sql files that mysql dumps of each database on my server. e.g. ... ppassword < database1-2011-01-15.sql See Question&Answers more detail:os...

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

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589 views

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linux - how to detect invalid utf8 unicode/binary in a text file

I need to detect corrupted text file where there are invalid (non-ASCII) utf-8, Unicode or binary characters. ... on linux or other languages? See Question&Answers more detail:os...

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

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573 views

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linux - Bash Scripting - How to set the group that new files will be created with?

I'm doing a bash shell script and I want to change the default group that new files are created as. I ... Is there something for the group? See Question&Answers more detail:os...

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

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566 views

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linux - Where are all my inodes being used?

How do I find out which directories are responsible for chewing up all my inodes? Ultimately the root directory ... for the vague question. See Question&Answers more detail:os...

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

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584 views

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linux - Is there a way to check if there are symbolic links pointing to a directory?

I have a folder on my server to which I had a number of symbolic links pointing. I've since created ... pointing to a particular folder? See Question&Answers more detail:os...

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

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466 views

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linux - mysqld service stops once a day on ec2 server

Environment Details: Server: Amazon ec2 Linux Web Server: Apache Web Framework: Django with mod_wsgi Following I have ... much httpd process?? See Question&Answers more detail:os...

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

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640 views

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linux - How do I paste multi-line bash codes into terminal and run it all at once?

I need to paste a multi-line bash code into terminal, but whenever I do, each line gets run as a separate command as soon as it gets pasted. See Question&Answers more detail:os...

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

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941 views

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linux - How does cron internally schedule jobs?

How do "modern" cron daemons internally schedule their jobs? Some cronds used to schedule a run every so ... schedule pattern? Other? 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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613 views

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linux - Dropping of connections with tcp_tw_recycle

summary of the problem we are having a setup wherein a lot(800 to 2400 per second( of incoming ... between tcp_tw_recycle and tcp_tw_reuse? See Question&Answers more detail:os...

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

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640 views

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linux - bash - how to pipe result from the which command to cd

How could I pipe the result from a which command to cd? This is what I am trying to do: which oracle | cd cd < ... oracle | sed 's//oracle//g'` 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 - RealUID, Saved UID, Effective UID. What's going on?

This is a set-root-uid program $ls -l -rwsr-sr-x 1 root root 7406 2011-12-13 22:37 ./x* The source code: int ... (0) let's me change euid to 0? See Question&Answers more detail:os...

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

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664 views

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linux - Iterating over each line of ls -l output

I want to iterate over each line in the output of: ls -l /some/dir/* Right now I'm trying: for x in $(ls ... a whole, though. How do 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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442 views

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linux - What is the meaning of each line of the assembly output of a C hello world?

I ran gcc -S over this: int main() { printf ("Hello world!"); } and I got this assembly code: .file ... what it does it would be great. See Question&Answers more detail:os...

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

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699 views

1 answer

linux - Keep the window's name fixed in tmux

I'm new to tmux. I want to keep the windows' name fixed after I rename it. But after I renaming it, they ... can keep them in a static 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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563 views

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linux - symbolic link: find all files that link to this file

Hallo all, I need to do this in linux: Given: file name 'foo.txt' Find: all files that are symbolic links to 'foo.txt' How to do it? 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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765 views

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linux - How to get the list of dependent child images in Docker?

I'm trying to remove an image and I get: # docker rmi f50f9524513f Failed to remove image (f50f9524513f): ... containers with that image id. See Question&Answers more detail:os...

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

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714 views

1 answer

linux - Find the IP address of the client in an SSH session

I have a script that is to be run by a person that logs in to the server with SSH. Is there a way to ... would be cooler if I just found out. See Question&Answers more detail:os...

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

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635 views

1 answer

linux - Tar archiving that takes input from a list of files

I have a file that contain list of files I want to archive with tar. Let's call it mylist.txt It contains ... tar file1.txt file2.txt file10.txt See Question&Answers more detail:os...

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

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535 views

1 answer

linux - What's a .sh file?

So I am not experienced in dealing with a plethora of file types, and I haven't been able to find much ... to actually implementing it? 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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610 views

1 answer

linux - Get specific line from text file using just shell script

I am trying to get a specific line from a text file. So far, online I have only seen stuff like sed, ... get the contents of a particular line See Question&Answers more detail:os...

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

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656 views

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linux - How do I extract the contents of an rpm?

I have an rpm and I want to treat it like a tarball. I want to extract the contents into a directory so I can ... that is of no concern to me. See Question&Answers more detail:os...

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

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802 views

1 answer

linux - Remove redundant paths from $PATH variable

I have defined the same path in the $PATH variable 6 times. I wasn't logging out to check whether it worked. How ... /bin:/sbin:/bin:/usr/games See Question&Answers more detail:os...

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

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710 views

1 answer

linux - Why does find -exec mv {} ./target/ + not work?

I want to know exactly what {} ; and {} + and | xargs ... do. Please clarify these with explanations. ... please explain what am I doing wrong? See Question&Answers more detail:os...

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

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808 views

1 answer

linux - How do I increase the scrollback buffer in a running screen session?

Lets say I have a currently running screen session I am interacting with through putty. I've realized that the scrollback ... a way to do this? See Question&Answers more detail:os...

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

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570 views

1 answer

linux - find -exec cmd {} + vs | xargs

Which one is more efficient over a very large set of files and should be used? find . -exec cmd {} + ... no funny characters in the filenames) See Question&Answers more detail:os...

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

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