The command-line is the interactive interface to your shell.
2
votes
2answers
43 views
Bash commands with spaces in them (git config or git-config?)
Please forgive me if this seems easy, but I only started learning Unix 2 days ago.
Basically, I have been taught that when typing a command into the terminal it needs to be of the form:
[command ...
3
votes
0answers
31 views
How do I make the CLI run on dedicated graphics?
I just finished my Gentoo minimal install and the first thing I wonder is why I get no picture. I did have signal on the live CD, so that was pretty odd. I plugged the monitor into the Intel HD ...
1
vote
2answers
64 views
What does the tilde (~) mean at the end of a filename? [duplicate]
What is the file with the ~ at the end of the filename for?
$ ls # aliased to add flags
-rwxrwxr-x 1 durrantm 2741 May 16 09:28 strip_out_rspec_prep_cmds.sh~*
drwxrwxr-x 13 durrantm 4096 May 16 ...
1
vote
0answers
30 views
Convert ASCII-8BIT to UTF-8 using OSX' .bash_profile
When running certain rails scripts in OSX' Terminal, I get warnings such as the following:
unable to convert "\xA9" from ASCII-8BIT to UTF-8 for ...
0
votes
1answer
30 views
Opera, Firefox has no kiosk option like Chrome gives it openly?
While using Chrome kiosk mode, i have problem with openbox desktop, its not doing correct for some javascript rendering. So i wanted to test opera and firefox but both does not support kiosk at all ...
-1
votes
1answer
42 views
Delimiters of program arguments?
What is the syntax to delimit the arguments of a C program.
For example, if I type :
./myprogram 1 2 3 | grep result
The | grep result will be interpreted as arguments (and passed as argv). So how ...
2
votes
1answer
41 views
Always redirect error to /dev/null
I know I can redirect the error messages from a command to /dev/null using the following syntax:
command arg1 arg2 2>/dev/null
But is there a way to do this by default so that the error messages ...
1
vote
2answers
31 views
Splitting large PDF into small files
Using pdftk it is possible to extract page ranges from a pdf using
pdftk a.pdf cat 124-end output b.pdf dont_ask
I have a bunch of huge PDFs with about 500 pages and over 100 MB, is it possible to ...
1
vote
0answers
39 views
Install Linux Mint 14 from CLI
I'm trying to install Linux Mint 14 from a live cd on a HP Pavilion laptop. I got some problem with X and the nvidia card, which prevents X from starting (and therefore prevents the live installer ...
1
vote
2answers
48 views
Chaining mysqldumps commands to output a single gzipped file
Let's say I have these series of commands
mysqldump --opt --databases $dbname1 --host=$dbhost1 --user=$dbuser1 --password=$dbpass1
mysqldump --opt --databases $dbname2 --host=$dbhost1 --user=$dbuser1 ...
0
votes
1answer
41 views
How to generate 4 WEP keys with linux commands?
I have a sagem router. this router is able to generate 4 WEP keys from a given passphrase.
Example:
Passphrase: "hahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahaha"
key1: ...
3
votes
1answer
77 views
Understanding grep --label=
I am looking for an explanation how grep --label=LABEL works: Maybe somebody can give me an example [or two] on what --label= is for.
I understand what grep and zgrep are supposed to do – the ...
4
votes
3answers
87 views
How to constraint time a program runs in Linux?
I have several simulations to do, each is invoked with python simulate.py <parameter list>. The problem with these simulations is that some of them hang without quiting, which prevents me from ...
2
votes
3answers
73 views
Use sed to find whole word and replace
I have the following block of text in a file:
test3.legacy test4.legacy test3 test3.kami
I only want to search for test3 as a whole and replace it with nothing. Unfortunately, all my attempts have ...
1
vote
1answer
34 views
How to retrieve information about locked accounts
Is it possible to retrieve info regarding to locked unix accouts?
I am interested in seeing information about what date and time the lockout happend and from what hostname (pc name). I would like to ...
2
votes
2answers
62 views
Get network information through Ubuntu Terminal
Is there a command where, when entered outputs information such as:
If the network connection is wired or wireless
if it is a wireless network, the name of the wireless network
How strong the signal ...
2
votes
4answers
45 views
Use xdg-open to open a url with a new process
I'm starting to experiment with Crunchbang (which is based on Debian, and uses terminator) as a web development environment, and one of the things I am struggling with is the behaviour of xdg-open. I ...
0
votes
2answers
52 views
Grep to search directories for patterns inside a text file
I have a file where it contains a list of search patterns (searchPattern.txt). Its contents is similar to the contents below where there are 3000+ of them.
123456
234567
345678
.
.
.
What I wanted ...
4
votes
1answer
41 views
Suspend and edit previous single line commands
Say I want to modify the latter of some concatenated command line options, is it possible without killing the first command?
Specifically I have compile and run scripts executed thusly:
> compile ...
2
votes
1answer
44 views
Proper syntax for “id -r” command
I'm trying to see if id -r will print out the UID or username of the user who logged into the system despite any su's or sudo's. I'm interested in doing this so I can keep people a little more ...
3
votes
2answers
124 views
Change colors in console/virtual terminal
Is there a way to alter all the available colors in console / virtual terminal?
By console, I mean what you get after pressing CTRL + ALT + F1 and not anything like xterm or urxvt. So, I guess that ...
9
votes
2answers
142 views
What are the characters printed when Alt+Arrow keys are pressed?
When I press AltUp, A printed to terminal screen. Same thing happened when I pressed AltDown but B is printed instead.
Other characters that I realized;
AltLeft = D and AltRight = C
What is the ...
2
votes
1answer
31 views
QEMU Direct Access to Video Card (or, QEMU Video Output without X11)
I have a system that boots up into Linux at power on and then needs to boot into Windows XP Embedded. After messing around with kexec and grub4dos, things aren't working out too well.
One idea that ...
4
votes
0answers
68 views
why . and .. are listed when ls -a command executed? [duplicate]
When I execute the ls -a command, all files and folders in that directory listed, as well as . and .. are listed too.
Why is that? Are they a file or folder?
0
votes
0answers
23 views
IBM V7000 scripts for monitoring
Hello (I'm no hard core coder:),
I try to develop a script to do some very basic monitoring on an IBM SVC.
My goal is to get some information about the nodes and my quroum status and then send ...
5
votes
2answers
65 views
Combining multiple process substitution
Suppose you tried something like this:
$ paste ../data/file-{A,B,C}.dat
and realize that you want to sort each file (numerically, let's suppose) before pasting. Then, using process substitution, ...
0
votes
1answer
48 views
Jingle CLI client / Jitsi replacement / VOIP
I am looking for a Jingle client for the command line.
Currently, I use Jitsi, but my dreams of not needing the GUI for more than just web-browsing are not realized due to my reliance on this ...
1
vote
1answer
58 views
How to access u boot environment from linux?
How can I access and change the u-Boot env variables in linux. Using the u-boot/tools/env directory in u boot directory:
u-boot$ make env
Which created the executable file fw_printenv. I copied ...
2
votes
1answer
46 views
Confirm before exit the command-prompt
I am trying to have a confirmation message every time I type exit command in the command-prompt. To do this, I have tried to use trap in .bashrc file but it seem like trap is not a solution as it run ...
-1
votes
1answer
33 views
delete file with name --help.tgz [duplicate]
I have file with name --help.tgz. I want to delete but don't know how.
I tried rm "--help.tgz", rm \-\-help.tgz and it did not work. How can I delete a file with such name?
2
votes
1answer
30 views
zsh - check arguments of a command before executing it
Question: Is there an easy way how I can teach zsh to check the command line before executing it? I know that I can completely wrap a specific program with an extra script, but this is not what I want ...
0
votes
4answers
55 views
concatenating multiple files with multiple headers
Im trying to concatenate multiple files with multiple headers to have one file with all the information in it for example.
File 1:
Numbers
1
2
3
Letters
A
B
C
File 2:
Numbers
4
5
6
Letters
D
E
...
2
votes
6answers
133 views
sort ls output by users
On Linux, is there a way to sort ls output by users? What I try to achieve is something like this:
user_a file1
user_a file2
user_b another_file
user_c this_file
user_c ...
1
vote
2answers
89 views
How to avoid the need to issue “y” several times when removing protected file
I'm looking for a solution to be used as
a response to "rm: remove write-protected regular file [x] ?"
I was thinking of issuing a character followed by carriage return for several amount of times, ...
3
votes
3answers
93 views
Count number of lines of output from previous program
I'm trying to count the number of lines of output a certain program produces. The problem is, the program takes a long time to run, and I want to display the output to the user. Is there a way to ...
1
vote
0answers
21 views
rsstail Not Printing Output
I've installed rsstail 1.8 on my linux box and everything seems to be going smoothly, knock on wood, except for the part where rsstail isn't printing the streams. Running the command, I see that it's ...
4
votes
3answers
76 views
Why should 'Character Classes' be preferred over 'Character Ranges' In Shell (Bash)?
The Linux Command Line (Book - page count 47) says:
... you have to be very careful with them [character ranges] because they will not produce the expected results unless properly configured. For ...
0
votes
1answer
57 views
finger and who commands usage
I know that the finger command used to display information about local and remote users.
finger --> display users log in on local machine, even if remotely.
finger @hostname --> display users log in ...
2
votes
1answer
34 views
Alternative to xxd for QNX
I was just introduced to xxd today. See link. I am very familiar with the QNX hd and odcommands, both of which will take input and create a hex dump (or octal dump if you like). See hd and od.
What I ...
0
votes
1answer
36 views
(e)grep and atomic grouping [comprehension question]
I am trying to understand the correct use of »atomic grouping« a.k.a. »independent subexpressions« a.k.a. »non-backtracking subpattern« [this are the terms I found ...
0
votes
0answers
56 views
`find /etc/profile` in GRUB returns “file not found” [closed]
When GRUB loaded at boot, I entered c in the command window, then at the grub > prompt, I tried find /etc/profile. It returned "file not found".
Some other files also failed. However, I can find ...
1
vote
2answers
100 views
cannot mount .img file - “not a directory” error
I try to execute the following command on an ubuntu 12.04 system:
sudo mount minix203.img -o loop -t minix /mnt/myminix/
in order to mount an .img file with minix partition; and get the following ...
1
vote
1answer
64 views
Safely convert unicode strings to printable characters
I have many HTML files containing mixed unicode strings like \303\243 and printable characters like %s. What I'd like to do is converting the unicode strings into printable characters in a safe way.
...
2
votes
2answers
18 views
Start Repl/CLI in Background and Feed Commands
Lets say the python repl takes a long time to start up, is there a way to start it up in the background so I can create an alias and feed it commands like python-current "command to run".
0
votes
2answers
91 views
what is “an invisible whitespace character that takes up space”
One can look up Unicode Characters with Regular Expressions. On Jan Goyvaerts website I found a RegExp whose meaning I don't understand :
\p{Zs} or \p{Space_Separator}: a whitespace character that ...
0
votes
2answers
60 views
'df' command doesn't list /home directory
In the book I am reading, the output of df command is shown like this:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 15115452 5012392 9949716 34% /
/dev/sda5 59631908 ...
0
votes
1answer
22 views
Syntax of DISPLAY=:0 unity --replace or DISPLAY=:0 compiz --replace
Why don't the commands have a & between the setting of DISPLAY and running unity or compiz.
I understand that both work (re-starting unity or compiz), but fail to see why are they the way they ...
0
votes
0answers
41 views
Rsync seems to back up files that haven't been opened or changed
I have started using rsync to back some data on my mac to an external HD. It works really well, but I have noticed something odd. Every time I run the command, I get a list of files that haven't been ...
2
votes
2answers
131 views
what is pts/0 and (:0.0) in linux by type who am i
When I type the command:
[root@degeneration Desktop]# who am i
root pts/0 2013-04-12 15:08 (:0.0)
What is pts/0 and what is meant by (:0.0)?
0
votes
1answer
52 views
Add a new user steps for Oracle Linux 5
It's been over 10 years since I last used RedHat (which I believe that Oracle Linux came from). So I cannot remember the steps to create a new user, add them to the appropriate groups, set up their ...
