All Questions
2,724
questions
1305
votes
31
answers
824k
views
Pipe to/from the clipboard in a Bash script
Is it possible to pipe to/from the clipboard in Bash?
Whether it is piping to/from a device handle or using an auxiliary application, I can't find anything.
For example, if /dev/clip was a device ...
- 137k
612
votes
6
answers
1.2m
views
How to run a shell script on a Unix console or Mac terminal?
I know it, forget it and relearn it again. Time to write it down.
- 11.1k
455
votes
15
answers
367k
views
sed command with -i option failing on Mac, but works on Linux
I've successfully used the following sed command to search/replace text in Linux:
sed -i 's/old_link/new_link/g' *
However, when I try it on my Mac OS X, I get:
"command c expects \ followed by ...
- 180k
420
votes
18
answers
411k
views
View tabular file such as CSV from command line [closed]
Anyone know of a command-line CSV viewer for Linux/OS X? I'm thinking of something like less but that spaces out the columns in a more readable way. (I'd be fine with opening it with OpenOffice Calc ...
- 12.7k
411
votes
21
answers
362k
views
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 ...
- 64.8k
344
votes
14
answers
119k
views
sed in-place flag that works both on Mac (BSD) and Linux [closed]
Is there an invocation of sed todo in-place editing without backups that works both on Linux and Mac? While the BSD sed shipped with OS X seems to need sed -i '' …, the GNU sed Linux distributions ...
- 6,071
342
votes
12
answers
511k
views
What languages are Windows, Mac OS X and Linux written in?
I was just wondering who knows what programming languages Windows, Mac OS X and Linux are made up from and what languages are used for each part of the OS (ie: Kernel, plug-in architecture, GUI ...
- 47.1k
276
votes
6
answers
397k
views
How would I get a cron job to run every 30 minutes?
I'm looking to add a crontab entry to execute a script every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0.
*/30 * * * ...
- 144k
254
votes
22
answers
277k
views
How can I use xargs to copy files that have spaces and quotes in their names?
I'm trying to copy a bunch of files below a directory and a number of the files have spaces and single-quotes in their names. When I try to string together find and grep with xargs, I get the ...
- 17.6k
240
votes
16
answers
130k
views
How to send data to local clipboard from a remote SSH session
Most Unix-like systems have a command that will let you pipe/redirect output to the local clipboard/pasteboard, and retrieve from same. On OS X, these commands are
pbcopy, pbpaste
Is there a way to ...
- 165k
238
votes
16
answers
143k
views
Finding current executable's path without /proc/self/exe
It seems to me that Linux has it easy with /proc/self/exe. But I'd like to know if there is a convenient way to find the current application's directory in C/C++ with cross-platform interfaces. I've ...
- 2,601
236
votes
7
answers
79k
views
Linux equivalent of the Mac OS X "open" command [closed]
I've found the "open" command in Mac OS X very handy in the command line. From "man open":
The open command opens a file (or a directory or URL), just as if you had
double-clicked the file's ...
Liu Chang
230
votes
6
answers
215k
views
Delete .DS_STORE files in current folder and all subfolders from command line on Mac [duplicate]
I understand I can use find . -name ".DS_Store" to find all the .DS_Store files in the current folder and all subfolders. But how could I delete them from command line simultaneously? I found it's ...
- 3,060
219
votes
1
answer
151k
views
SSH Port forwarding in a ~/.ssh/config file? [closed]
So I typically run this command a lot:
ssh -L 5901:[email protected]:5901
I use it to do VNC over SSH.
How do I convert that command into something that will work in a ~/.ssh/config ...
- 5,777
184
votes
4
answers
135k
views
sed command with -i option (in-place editing) works fine on Ubuntu but not Mac [duplicate]
I know nothing about Sed but need this command (which works fine on Ubuntu) to work on a Mac OSX:
sed -i "/ $domain .*#drupalpro/d" /etc/hosts
I'm getting:
sed: 1: "/etc/hosts": extra characters at ...
- 2,606
178
votes
14
answers
173k
views
Recursive search and replace in text files on Mac and Linux
In the linux shell, the following command will recursively search and replace all instances of 'this' with 'that' (I don't have a Linux shell in front of me, but it should do).
find . -name "*.txt" -...
- 16.6k
166
votes
9
answers
146k
views
Why Maven uses JDK 1.6 but my java -version is 1.7
I have setup maven in my terminal, and when getting the version settings (using mvn -v) it seems it uses JDK 1.6, while I have JDK 1.7 installed. Is there anything wrong?
The commands I enter are ...
- 2,529
123
votes
4
answers
9k
views
Why does rand() repeat numbers far more often on Linux than Mac?
I was implementing a hashmap in C as part of a project I'm working on and using random inserts to test it. I noticed that rand() on Linux seems to repeat numbers far more often than on Mac. RAND_MAX ...
- 1,353
116
votes
2
answers
87k
views
Should I use libc++ or libstdc++? [closed]
I am developing command line interface executables for both osx and linux using c/c++. The project will link against opencv. Should I use libc++ or libstdc++?
- 3,775
113
votes
6
answers
258k
views
"pkg-config script could not be found" on OSX
I am trying to install some software on my mac; however I keep receiving the same error:
configure: error: The pkg-config script could not be found or is too old. Make sure it
is in your PATH or set ...
- 2,511
109
votes
4
answers
48k
views
How to start a shell without any user configuration?
I need to use a "clean" shell (e.g. bash) under Linux/OSX terminal without any user configuration, but it reads config info from some files (e.g ~/.bashrc) every time it starts. I can modify the file ...
- 2,607
100
votes
14
answers
353k
views
How to check all versions of Python installed on OS X and CentOS
I just started setting up a CentOS server today and noticed that the default version of Python on CentOS is set to 2.6.6. I want to use Python 2.7 instead. I googled around and found that 2.6.6 is ...
- 6,280
88
votes
5
answers
46k
views
Is Mac OS X a POSIX OS?
What is it that makes an OS a POSIX system? All versions of Linux are POSIX, right? What about Mac OS X?
- 32.7k
84
votes
8
answers
190k
views
How to convert DATE to UNIX TIMESTAMP in shell script on MacOS
On Linux you can convert a date like "2010-10-02" to a unix timestamp in shell script by
date -d "2010-10-02" "+%s"
Since Mac OS does not have the equivalent -d for date. How do you go about ...
- 4,713
84
votes
3
answers
64k
views
How does Docker run a Linux kernel under macOS host?
I installed Docker on my macOS Sierra as follows. Note I don't have VirtualBox installed.
brew cask uninstall virtualbox
brew cask install docker
My macOS details.
$ uname -a
Darwin m-C02QG7TRG8WN....
- 19.8k
77
votes
12
answers
49k
views
Cross-platform space remaining on volume using python
I need a way to determine the space remaining on a disk volume using python on linux, Windows and OS X. I'm currently parsing the output of the various system calls (df, dir) to accomplish this - is ...
Justin Waddell
73
votes
11
answers
164k
views
How do you run a script on login in *nix?
I know I once know how to do this but... how do you run a script (bash is OK) on login in unix?
- 19.3k
70
votes
7
answers
158k
views
id_rsa.pub file SSH Error: invalid format
My co worker and I have been trying to get my macbook to ssh into our AWS production server with no luck, this did work several months ago, but when we went to do it yesterday - we kept getting the ...
- 857
65
votes
2
answers
53k
views
nvm: Cannot uninstall currently-active node version
I am doing this on OSX. I need to delete node. but after I type cmd: nvm uninstall v4.4.7 it prompts me that nvm: Cannot uninstall currently-active node version v4.4.7 How can I uninstall node ...
- 3,090
65
votes
12
answers
111k
views
Linux USB: turning the power on and off?
How can I programmatically enable and disable the power to a particular USB port on Linux? Is such a thing even possible? Mac answers appreciated as well!
I was trying for a BOC (don't pretend you ...
- 302k
64
votes
4
answers
34k
views
Discovery of Dynamic library dependency on Mac OS & Linux
On Windows there is a tool Depends.exe to discover dependency of an EXE/DLL file on other DDLs. Which commandline tool is equivalent on Mac OS and Linux?
- 18.2k
64
votes
10
answers
83k
views
A way to determine a process's "real" memory usage, i.e. private dirty RSS?
Tools like 'ps' and 'top' report various kinds of memory usages, such as the VM size and the Resident Set Size. However, none of those are the "real" memory usage:
Program code is shared between ...
- 18.8k
63
votes
1
answer
3k
views
Weak symbol aliases on OS X similar to those on Linux, or a closest equivalent?
What I do
When writing shared libraries for Linux, I tend to pay attention to relocations, symbol visibility, GOT/PLT etc.
When applicable, I am trying to avoid calling PLT stubs when functions from ...
user405725
62
votes
1
answer
20k
views
Does OS X have an equivalent to /dev/shm?
Does OS X (Snow Leopard in particular) have an equivalent to (some versions of) Linux's /dev/shm , ie something where you can write to and read from a file without necessarily touching the hard drive?
- 80.4k
60
votes
4
answers
107k
views
How to download a file into a directory using curl or wget? [closed]
I know I can use the following 2 commands to download a file:
curl -O example.com/file.zip
wget example.com/file.zip
But I want them to go into a specific directory. So I can do the following:
curl ...
- 52.1k
57
votes
7
answers
51k
views
Installing rgl on Ubuntu and Mac: X11 not found
I have seen this question here: Error in loading rgl package with Mac OS X but there is no mentioning about installation error, which is my case. I cannot install rgl package, using this command in R:
...
- 5,178
56
votes
3
answers
24k
views
What's the difference between "env" and "set" (on Mac OS X or Linux)? [closed]
I get similar results running "env" and "set". Set gives more results - is it a superset of env?
The man page for set doesn't give any information. How do these commands work and what's the ...
- 1,455
51
votes
6
answers
48k
views
Counting number of files in a directory with an OSX terminal command
I'm looking for a specific directory file count that returns a number. I would type it into the terminal and it can give me the specified directory's file count.
I've already tried echo find "'...
- 1,183
50
votes
8
answers
80k
views
How can I define a bash alias as a sequence of multiple commands? [duplicate]
I know how to configure aliases in bash, but is there a way to configure an alias for a sequence of commands?
I.e say I want one command to change to a particular directory, then run another command.
...
- 5,845
49
votes
3
answers
64k
views
ldconfig equivalent in Mac OS X?
Is there a parallel command to Linux's LDCONFIG for Mac OS X's Terminal?
- 9,212
48
votes
9
answers
57k
views
Colored shell script output library
I am looking for a definitive way to build shell scripts that generates colored output.
Unfortunately I am having a hard time finding an appropriate lib or good technique for doing this. I found a ...
- 2,264
48
votes
13
answers
60k
views
Command line Arduino compiling and uploading?
How do I compile and upload Arduino sketches from the command line on Mac and Linux? I've installed the Arduino programming environment. Are there some sample makefiles anywhere?
- 302k
48
votes
8
answers
83k
views
How do you do non-blocking console I/O on Linux in C?
How do you do nonblocking console IO on Linux/OS X in C?
- 2,159
46
votes
7
answers
95k
views
No package 'libxml-2.0' found
I am trying to add libvisio in my mac os x from https://wiki.documentfoundation.org/DLP/Libraries/libvisio
I have added all dependancy described there listed bellow:
boost
gperf
icu
librevenge
...
- 708
46
votes
5
answers
33k
views
sed: -i may not be used with stdin on Mac OS X
I am using a bison parser in my project. When I run the following command:
sed -i y.tab.c -e "s/ __attribute__ ((__unused__))$/# ifndef __cplusplus\n __attribute__ ((__unused__));\n# endif/"
I get ...
- 562
45
votes
18
answers
43k
views
Keep Remote Directory Up-to-date
I absolutely love the Keep Remote Directory Up-to-date feature in Winscp. Unfortunately, I can't find anything as simple to use in OS X or Linux. I know the same thing can theoretically be ...
- 56k
45
votes
3
answers
67k
views
What is the difference between xterm-color & xterm-256color?
I've come across both xterm-color and xterm-256color as options when trying to set up my terminal program to use color - i.e. you can set your TERM environment variable to either one.
I was ...
- 3,076
44
votes
5
answers
66k
views
connecting to amazon aws linux server by ssh on mac
I created a new keypair and downloaded it to my mac, then set up a new Amazon Linux AMI server with that keypair and my security group. Now I need to put the keypair .pem file that I downloaded in a ....
- 6,729
43
votes
4
answers
42k
views
Macros for GCC/G++ to differentiate Linux and Mac OSX?
Macros for GCC/G++ to differentiate Linux and Mac OSX?
- 18.2k
42
votes
6
answers
62k
views
How to obtain MAC address of WiFi network interface?
It seems the java.net.NetworkInterface implementation of android does not have a
byte[] getHardwareAddress() method
http://developer.android.com/reference/java/net/NetworkInterface.html
I've found ...
- 6,349