Newest Linux Questions | Wyzant Ask An Expert

05/06/19

Argument list too long error for rm, cp, mv commands?

I have several hundred PDFs under a directory in UNIX. The names of the PDFs are really long (approx. 60 chars). When I try to delete all PDFs together using the following command: rm -f... more

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Linux Unix Bash

05/05/19

How do I write stderr to a file while using "tee" with a pipe?

I know how to use `tee` to write the output (`STDOUT`) of `aaa.sh` to `bbb.out`, while still displaying it in the terminal: ./aaa.sh | tee bbb.out How would I now also write `STDERR` to a file... more

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Linux Unix Vi

05/05/19

Getting root permissions on a file inside of vi?

Often while editing config files, I'll open one with vi and then when I go to save it realize that I didn't type sudo vi filename Is there any way to give vi sudo privileges to save the file? I... more

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Linux Bash Posix

05/04/19

How to kill all processes with a given partial name?

I want to kill all processes that I get by: ps aux | grep my_pattern How to do it? This does not work: pkill my_pattern

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Linux Python File Io File Permissions

05/04/19

open() in Python does not create a file if it doesn't exist?

What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it as read/write? From what I read, `file = open('myfile.dat', 'rw')` should do this,... more

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Linux Scripting Bash Shell

05/04/19

How do I know the script file name in a Bash script?

How can I determine the name of the Bash script file inside the script itself? Like if my script is in file `runme.sh`, then how would I make it to display "You are running runme.sh" message... more

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Linux Unix Bash Shell

05/04/19

Aborting a shell script if any command returns a non-zero value?

I have a Bash shell script that invokes a number of commands. I would like to have the shell script automatically exit with a return value of 1 if any of the commands return a non-zero value. Is... more

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Linux Microsoft Windows Windows Android

05/03/19

OneNote alternative for Windows, Linux, and Android?

I’m looking for an alternative to Microsoft OneNote. I usually use OneNote to sync my notes between my Windows 8 computer and my Android phone, but I’ve been using Linux (Ubuntu 14.04) quite often... more

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Linux Bash Grep Shell

05/02/19

How to 'grep' a continuous stream?

Is that possible to use `grep` on a continuous stream? What I mean is sort of a `tail -f <file>` command, but with `grep` on the output in order to keep only the lines that interest... more

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Linux Unix Terminal Shell

05/01/19

How can I copy the output of a command directly into my clipboard?

How can I pipe the output of a command into my clipboard and paste it back when using a terminal? For instance: cat file | clipboard

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Linux Microsoft Windows Windows Gratis

04/28/19

Is there a program to control other computers from another computer?

Is there a good **remote desktop software tool** that I can use to control my Windows and Linux PCs from my Mac, and vice-versa? I don't care if it uses up lots of internet bandwidth. Desired... more

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Linux Unix Sed

04/28/19

Delete empty lines using sed?

I am trying to delete empty lines using sed: sed '/^$/d' but I have no luck with it. For example, I have these lines: xxxxxx yyyyyy zzzzzz and I want it to be like: xxxxxx ... more

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Linux Terminal Command Line

04/28/19

How to get the current date and time in the terminal and set a custom command in terminal for it?

I have to check the time in linux terminal.<br/> What is the command for getting date and time in Linux terminal ?<br/> Is there any way in which we can set custom function ?

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Linux Git Github

04/27/19

Git keeps asking me for my ssh key passphrase?

I'm using Linux and I created keys as instructed in the github tutorial, registered them with github, and tried using ssh-agent explicitly — yet git continues to ask me for my passphrase every time... more

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Linux Unix Macos Mkdir

04/27/19

Is there a way to make mv create the directory to be moved to if it doesn't exist?

So, if I'm in my home directory and I want to move foo.c to ~/bar/baz/foo.c , but those directories don't exist, is there some way to have those directories automatically created, so that you would... more

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Linux C Macros Linux Kernel

04/26/19

What is ":-!!" in C code?

I bumped into this strange macro code in [/usr/include/linux/kernel.h][1]: /* Force a compilation error if condition is true, but also produce a result (of value 0 and type size_t), so the... more

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Linux C Gcc C Preprocessor

04/26/19

Why does the C preprocessor interpret the word "linux" as the constant "1"?

Why does the C preprocessor in GCC interpret the word `linux` (small letters) as the constant `1`?test.c: #include <stdio.h> int main(void) { int linux = 5; ... more

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Linux Bash Recursion

04/25/19

Recursively look for files with a specific extension?

I'm trying to find all files with a specific extension in a directory and its subdirectories with my bash (Latest Ubuntu LTS Release). This is what's written in a script file: #!/bin/bash ... more

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Linux Scripting Bash Heredoc

04/25/19

How does "cat << EOF" work in bash?

I needed to write a script to enter multi-line input to a program (`psql`). After a bit of googling, I found the following syntax works: cat << EOF | psql ---params BEGIN; `pg_dump... more

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Linux Symlink

04/22/19

How to symlink a file in Linux?

I want to make a symbolic link in Linux. I have written this bash command where the first path is the folder I want link into and the second path is the compiled source. ln -s... more

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Linux Microsoft Word

04/20/19

Markdown to Word/PDF converter for Linux?

Does anyone know of a good Markdown to Word Converter? It would be great if it also converts to PDF.

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Answers •1

Linux Hex Hex Editors

04/20/19

Need a good hex editor for Linux?

I need a good HEX editor for Linux, and by good I mean: * Fast * Search/replace features * Can display data not only in hex, but also binary, octal, etc. * Can work with huge (> 1 gb) files... more

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Linux Unix Path File

04/20/19

How to get full path of a file?

Is there an easy way I can print the full path of `file.txt` ? file.txt = /nfs/an/disks/jj/home/dir/file.txt The `<command>` dir> <command> file.txt should print ... more

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Linux Microsoft Windows Windows Android

04/20/19

Note-taking application that can sync between Windows, Ubuntu and Android?

Evernote has been one of the most used note-taking application for me, with it syncing between my Windows PC and my Android device. I usually use the Evernote desktop client on my Windows PC and... more

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Linux Unix Cron Crontab

04/20/19

Restarting cron after changing crontab file?

Do I have to restart cron after changing the crontable file?

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Answers •1

Argument list too long error for rm, cp, mv commands?

How do I write stderr to a file while using "tee" with a pipe?

Getting root permissions on a file inside of vi?

How to kill all processes with a given partial name?

open() in Python does not create a file if it doesn't exist?

How do I know the script file name in a Bash script?

Aborting a shell script if any command returns a non-zero value?

OneNote alternative for Windows, Linux, and Android?

How to 'grep' a continuous stream?

How can I copy the output of a command directly into my clipboard?

Is there a program to control other computers from another computer?

Delete empty lines using sed?

How to get the current date and time in the terminal and set a custom command in terminal for it?

Git keeps asking me for my ssh key passphrase?

Is there a way to make mv create the directory to be moved to if it doesn't exist?

What is ":-!!" in C code?

Why does the C preprocessor interpret the word "linux" as the constant "1"?

Recursively look for files with a specific extension?

How does "cat << EOF" work in bash?

How to symlink a file in Linux?

Markdown to Word/PDF converter for Linux?

Need a good hex editor for Linux?

How to get full path of a file?

Note-taking application that can sync between Windows, Ubuntu and Android?

Restarting cron after changing crontab file?

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