The command-line is the interactive interface to your shell.

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2
votes
2answers
118 views

Incorrect output from cp, rm, and so on

When I run, say, cp, I get output like the following: # cp -v Foo Bar âFooâ -> âBarâ What's up with the weird â characters? Why is the shell doing this? It looks like some kind of strange ...
0
votes
1answer
109 views

Does the unix calendar program `pal` support line breaks?

The unix program pal is one of a variety of command-line calendar programs. Based on the man page, each line refers to an event, and it does not mention event descriptions that span multiple lines at ...
3
votes
1answer
546 views

How to talk to geoclue through its dbus interface?

I'm trying to better understand what geoclue does, and how to gain information from it. From my understanding, it can be accessed through it's dbus interface to find geographic information about the ...
5
votes
1answer
228 views

Lightdm service - contradictory results for `status` command

When I run in my gnome-terminal: service lightdm status everything looks OK and it is as expected: lightdm start/running, process 1221 But when I run: service --status-all 2>&1 | grep ...
2
votes
3answers
8k views

alternative to nslookup in rhel7?

nslookup does not come preinstalled in RHEL 7 Beta. I noticed even dig and host was not pre installed. I read couple of links which mentions nslookup is dead/deprecated, so is there an alternative for ...
0
votes
2answers
83 views

Prompt when copying multiple files?

When copying multiple files from one directory to another is there a way to get bash to run through each file and ask for y/n? I vaguely remember adding something to the end of my command like 'ok?' ...
0
votes
2answers
2k views

How to display technical codec info for a FLAC file?

Given a .flac file, how is it possible to query and display the technical info relating to the codec? I looked into man flac with no luck (the --analyze output is not humanly parseable). I'm ...
0
votes
1answer
66 views

How to issue a warning to administrator (when the administrator issues a system restart) when user has process running

Background I work on a development team and for each project we have a different server setup to emulate the environment of our customers. It can be hard to keep track of what I was doing on each ...
10
votes
3answers
780 views

How to execute a command repeatedly with different arguments?

I'm on Ubuntu. I copied some arguments (separated by newline) and I can use xsel to print them out like this $ xsel arg1 arg2 arg3 arg4 ... Now, I want to use each of these arguments for another ...
1
vote
1answer
328 views

How to extract the Nth file using 7-zip

I have an archive which, for reasons beyond my comprehension, contains 900 files all with the same name. That means that if I ask 7zip to extract them all, at the end there is just one file. The ...
1
vote
0answers
632 views

How to use fslint (in particular findnl) on the command line to actually mimic the behavior of the fslint-gui?

So I am trying the fslint tools. However, the help included in those tools as well as the man page don't indicate that the cleanup actions offered by the fslint-gui are also available through fslint ...
1
vote
2answers
504 views

MediaTomb fast image resize

The goal is to setup MediaTomb to (almost) instantaneously resize a 4-7MB jpeg from its original 8 or 12MP resolution down to somewhere about 1280x* so that it can be viewed on a mobile device. ...
0
votes
2answers
183 views

Using an email without email services

I know that I can send email with the mail command. Something like echo “Hello world” | mail -s “Hello world” foo@bar.com would do the trick. But, given that I and a partner are online, how can we ...
1
vote
4answers
3k views

command to find processor speed on zlinux machine

I have the following system : $ uname -a Linux <machine-name-snip> 2.6.18-92.el5 #1 SMP Tue Apr 29 13:16:58 EDT 2008 s390x s390x s390x GNU/Linux $ cat /etc/redhat-release Red Hat Enterprise ...
0
votes
2answers
101 views

How to set Linux to ask for authentication when running potentially dangerous commands?

I've faced times when I accidentally ran dangerous commands and lost all my data. How do I set Linux to ask for current user password or root user password when running potentially dangerous commands ...
0
votes
2answers
81 views

file(1) command termination when using the -f - option

Say I'd like to use the file -f - command inside a script, and send some input using the stdin, when I'm finished I'd like to terminate it gracefully, but unfortunately I haven't found any way to do ...
0
votes
2answers
97 views

htop displays incorrectly on different vps

When I use "htop" command for linux (+F5), layout on 2 my vps different: Why on my first server I see broken tree?
4
votes
1answer
403 views

One liner for padding columns (similar to printf) of output from the previous pipe command?

I'd normally use printf to pad each cell with enough whitespace to maintain header position over its respective column. Ultimately I can just iterate over each line of the output and do enough cut ...
1
vote
0answers
112 views

CLI network management

I've set up a console typewriter: a laptop with a minimal Debian install and no X server. I use it as a typewriter and I use wifi to sync my documents. I connect to wifi using wpa-supplicant. That ...
4
votes
1answer
5k views

What code runs when I type “sudo service nginx start”

I am having this problem: http://stackoverflow.com/questions/10939072/add-nginx-as-a-ubuntu-service-stop-and-reload-doesnt-work I am trying to understand if my code to start nginx is point to the ...
1
vote
1answer
90 views

Command works with tilde at the end. How?

I'm on Ubuntu. I have a script called myscripts in /usr/bin/myscripts This script simply changes the current directory to ~/Work/MyScripts Normally, I simply open a terminal and type ~/Desktop$ . ...
3
votes
7answers
164 views

Printing specific section of a line when a trigger value is present

I'm parsing data in the following format: prop1=value1:prop2=value2:prop3=value3+prop1=value4:prop2=value5 parts of the string are delimited by + properties can appear in any order the desired ...
2
votes
2answers
333 views

Custom help / man -like command (for reminders)

I often end up in a situation, where I don't use a command for a while, but then suddenly need to use it; and I need to wade through several help pages until constructing the command line I want. Case ...
1
vote
1answer
548 views

Is it possible to attach `kinit` to the first attempt to `ssh` without a Kerberos ticket?

My university uses Kerberos-based authentication for login to our unix servers. One way to get passwordless login is to run kinit, type my password, and then run ssh@host. For this setup, I do the ...
1
vote
0answers
29 views

Set memory allocation for applications in Ubuntu [duplicate]

I have an application running under Ubuntu that tries to consume all available memory. Is there a way to specify and restrict the allocations available for a given application?
2
votes
1answer
283 views

bash command line editing (Emacs shortcuts)

When writing a command on the bash command line, I can use CTRL+w to delete a word backwards, or ALT+d to delete word forwards. The problem is, that these two shortcuts are not exactly complementary: ...
1
vote
0answers
194 views

List/query Open X11 Display Connections?

I am hitting this bug: NEWT errors when closing sketch on Linux · Issue #1651 · processing/processing · GitHub, when using Processing on Linux (Ubuntu 11.04); my messages are: X11Util.Display: ...
2
votes
1answer
1k views

Pass bash script arguments in double quotes to php cli script

I am trying to pass arguments to a bash script and then to a php script, I have literally looked at 30+ links, and tried over a dozen examples, and I for whatever reason have not been able to get the ...
1
vote
1answer
2k views

Loading input from a file in lex

First of all, I was not sure whether to post this question here or on stackoverflow, but here's my question anyway. Besides using input redirection, i.e. ./code < inputFile.dat, is there any way I ...
3
votes
1answer
273 views

How to change the color of all highlights in a PDF file?

I want to change the color of every highlight in a PDF file (without having it do for every highlight manually). Preferably with a command line command. Here is an example PDF with a highlighted ...
2
votes
3answers
740 views

Tar compress folder without specifying the filename

Is it possible to use tar to compress a folder without giving the filename of the archive to store in? Normally you use: tar -zcvf prog-1-jan-2005.tar.gz /home/jerry/prog I want to do something ...
1
vote
1answer
92 views

log into a machine through another, with (de)compression at the ends only [duplicate]

I have looked all around but couldn't find the answer to a very simply question: I would like to log into machine C from machine A, passing through machine B. However, B is slow, so I would also like ...
4
votes
3answers
568 views

Why does export -p exclude $_ variable?

As far I know, there are 3 ways to see exported variables: $ export -p | wc -l 50 $ env | wc -l 51 $ printenv | wc -l 51 As you can see, export -p misses single variable. It's a $_ one: $ diff ...
1
vote
1answer
1k views

Exit of “> ” mode in Unix shell

In sh (not Bash), how would we abort execution of command when the prompt is in > mode? For example, when entering a string with quotes only at the beginning, it makes the prompt look like >, ...
1
vote
7answers
5k views

what are some uses of .(single period) & ..(double period) in the shell command line

The single period . means current working directory The double period .. means parent of the current working directory I can only think of . being used in relative pathname etc cd ./bin/usr How are ...
21
votes
2answers
1k views

How do I move all files output from a command?

I have this grep command to find files without the word Attachments in them. grep -L -- Attachments * I want to move all the files that are output from that command. How do I do that in bash? Do I ...
5
votes
3answers
7k views

Try to disable console output, console=null doesn't work

as mentioned above, I want to to completely turn off the console output, but putting console= or console=null in the kernel command line doesn't change a thing. When I enque quiet to the kernel ...
5
votes
2answers
951 views

Search/grep ftp remote filenames

I have already seen How to perform GREP on FTP? - that question implies that a grep in the remote file contents is needed; and as such, the answer is that the ftp protocol does not support that ...
1
vote
1answer
442 views

Adding pass completion to fish shell

I'm trying to get the CLI password manager pass to work in my fish shell with auto completion. I've already found the necessary file, yet am having trouble finding out where to put it, or rather ...
-2
votes
2answers
61 views

I don't have writing access to a subdirectory in /

I have a server running under Debian wheezy. I want to create a directory in /. I can't without running sudo mkdir myDirectory. Once in /myDirectory, I can't write anything or create a repertory. I ...
2
votes
2answers
752 views

What is the bash syntax for extracting the values from multiple instances of the same argument?

I want to use multiple instances of command line paramater such as the -d option used by PHP for passing PHP options. I am currently using the getopts command in bash. With PHP invocation it would ...
0
votes
1answer
348 views

Custom command wget without response

I have an arduino with an ethernet shield that is controlling a relay, which control the lights. I usually just use the phone to send a http get request from a widget in tasker, but I would like to be ...
2
votes
0answers
139 views

Why does the kernel boot faster with less memory allocated?

This is not a important question, I'm just curious. Something strange happened, which isn't quiet clear to me: In the kernel command line, the amount of the memory can be set statically with the ...
4
votes
4answers
2k views

How to sort a list of files by time, given only the filenames

Given a list of file names, how can I sort it by file modification time? The resulting output needs to look exactly like the input with the exception that the data has been sorted accordingly. Here ...
3
votes
2answers
2k views

Command Line Photo Organiser Like Shotwell but to run on headless server

Does anyone know of a program (or even bash script) that can take photos from various folders and then consolidate them into one place and organise them into a directory structure by date in the way ...
1
vote
1answer
114 views

What is the Command to check the history of the command executed which should based on the user who accessed it [closed]

I am looking for the command or script to meet the following requirement. I wanted a history of all the users who connected to my machine and what commands they execute in there session and at which ...
3
votes
1answer
189 views

uname shows duplicate architecture

Why does uname show x86_64 three times? This is Ubuntu 12.04.4. $ uname -a Linux seedbox 3.2.0-59-generic #90-Ubuntu SMP Tue Jan 7 22:43:51 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
2
votes
0answers
301 views

Character encoding issue with my linux install?

I just installed Ubuntu 12.04.4 64 bits, all seemed to be ok, when I started to work on console I noticed: that I couldn't get some accented characters typed in to the console, for example, if I ...
3
votes
1answer
41 views

Script to dripfeed files

I need to write a script that will check a directory for a given file type, say *.mov, and move up to, say, 50GB worth into another directory. The purpose being that we have a huge bunch of files that ...
2
votes
1answer
102 views

Looking for a “undo” for file with holes (GNU)

Linux supports sparse files aka 'file with holes' Note following commands alias mystat='stat -c "%n: %B*%b blocks %s bytes"' dd if=/dev/zero bs=1024k seek=4096 count=0 of=file-with-holes ls -l ...