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

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2
votes
6answers
150 views

What does pwd return?

Does the command pwd in a shell script return the directory the shell script is in?
1
vote
1answer
452 views

Is there a way to find the uptime of a network card in unix?

Some of the information i am requesting can be gleaned from /var/log/syslog , e.g: grep wlan /var/log/syslog But the usefulness of that information also depends on how you are network connecting; ...
7
votes
4answers
443 views

How to send output from one terminal to another without making any new pipe or file

I am just fooling around on my terminal (Gnome terminal). I was wondering is there a way to send output of one terminal to another without having to make a new file or pipe. for example: on first ...
0
votes
1answer
36 views

Solaris: Spooling filesystem is full

I have a Solaris 5.8 machine that will no longer print. print job that come from the terminal say: "See if spooling file system is full" I had a look around /var/spool but it isn’t particularly ...
6
votes
4answers
489 views

How to gather byte occurance statistics in binary file?

I'd like to know the equivalent of cat inputfile | sed 's/\(.\)/\1\n/g' | sort | uniq -c presented in ...
1
vote
0answers
9 views

Barebone Linux Bluetooth pairing

I have a small embedded ARM box, without any KVM, just a serial console, Net and a Bluetooth USB dongle. System is autocompiled using Buildroot framework and reasonably working. I can access the box ...
2
votes
1answer
47 views

What Command Line tools to connect from Unix to remote Windows?

I need to make some scripts for connecting from a Unix server to several Windows stations for automating file transfers. GUI is not needed and I can't install any additional software into Windows ...
-3
votes
2answers
41 views

How to achieve using ls command [on hold]

I have two files in a directory: abc_160101.txt and abc_a_160101.txt. How to list the first file only with ls command using abc_* or other pattern?
0
votes
2answers
43 views

Linux command clarification

ls -l | grep -v '^d' | sort -g -r -k 5 | head -2: I used this command to write into a text file. I've researched a bit online and I think these commands mean this: grep: a search that searches for ...
30
votes
4answers
35k views

How to attach terminal to detached process?

I have detached a process from my terminal, like this: $ process & That terminal is now long closed, but process is still running and I want to send some commands to that process's stdin. Is ...
3
votes
2answers
29 views

How do I transfer (to a usb drive) or read a .odt file in the command-line?

Currently my computer is not allowing me to start it up properly (guessing my hard drive is malfunctional), but I've figured out that Ctrl+Alt+(F1,F2,F3,F4,F5,F6,OR F7) allows me to access ...
19
votes
2answers
41k views

How to use command line to change volume?

I am trying to control the volume using my programming script. How can I do the following in Fedora 15, Ubuntu linux? Mute/ Unmute Volume up and volume down Note: Please note that I use a web USB ...
58
votes
11answers
66k views

How do I convert an epoch timestamp to a human readable format on the cli?

How do I convert an epoch timestamp to a human readable format on the cli? I think there's a way to do it with date but the syntax eludes me (other ways welcome).
16
votes
9answers
29k views

Generate random numbers in specific range

After googling a bit I couldn't find a simple way to use a shell command to generate a random decimal integer number included in a specific range, that is between a minimum and a maximum. I read ...
16
votes
4answers
18k views

find n most frequent words in a file

I want to find, say, 10 most common word in a text file. Firstly, solution should be optimized for keystrokes (in other words - my time). Secondly, for the performance. Here is what I have so far to ...
1
vote
2answers
138 views

View timestamp for CUPS print jobs

I'm looking for a way to view the timestamp of a job in CUPS. I've searched the man pages and can't seem to find it. The long term goal is to have a script that parses the time from the jobID and ...
0
votes
1answer
26 views

Give the command to remove duplicate lines in a .txt file and save the new file as new.txt file

I'm trying to do this but I cant create the file. I enter: sort myfile.txt uniq -u | tee newfile.txt and It wont create the file automatically. What am I missing here?
4
votes
5answers
194 views

Command line method to find repeat-word typos, with line numbers

Updated: Clarify line number requirement, some verbosity reductions From the command line, is there a way to: check a file of English text to find repeat-word typos, along with line numbers where ...
3
votes
1answer
313 views

What is the purpose of the grub command line

In the grub bootloader if you press esc it will take you to a command line interface that looks like grub> _ What is this promt used for? It doesn't look like it's connected to Linux. Is it a ...
10
votes
1answer
587 views

How do I 'unbook' a pdf

I have a pdf file that was made into a booklet format. It is meant to print on A4 paper in landscape orientation; here are two pages in the pdf, which should correspond to four pages in the actual ...
13
votes
3answers
3k views

How can I redirect `time` output and command output to the same pipe?

Suppose I have a binary called foo. If I want to redirect the output of foo to some other process bar, I could write ./foo | bar. On the other hand, if I wanted to time foo, and redirect the output ...
0
votes
1answer
34 views

Read columns from file into separate variables

I need to read the following input into separate columns as variables? input.txt b73_chr10 w22_chr9 w22_chr7 w22_chr10 w22_chr8 w22_chr6 I have written the following command;but I guess it ...
6
votes
2answers
269 views

Amplify quiet passages in an mp3 file

I have an mp3 file where is a dialog with two voices and one of the voices is very quiet. Is there a command or application that is able the detect the quiet passages and amplify them? The two voices ...
1
vote
1answer
21 views

Open multiple pdfs in Okular from command line

I have Okular configured that when it's already running and I open a pdf from the command line, it should open the new file as a new tab in Okular. However, if this new file is in another directory ...
-1
votes
1answer
29 views

Linux file create time [duplicate]

Hi I am new to Linux and I am searching a command that gives me the file create time in a folder. Thanks in advance
0
votes
0answers
12 views

embedded linux- to check uart in raspberry pi

Checking whether the Pi is sending and receiving UART data by installing the tool Minicom. Pi is sending serial data but is not receiving data. Whatever I type in Pi minicom is received to PC ...
0
votes
1answer
680 views

How to boot GUI on a fedora 21 server through the command line

I am trying to install a GUI onto my fedora21 virtual machine. The only problem is due to the nature of work i am doing it needs to be done through the command line( i am using a program called ...
3
votes
3answers
39 views

Can the Bash shell “Ignore” Excess copy-paste text?

Say, I have a "Quick&Dirty" Perl script in a gui text editor, and I start the Perl interpreter in a terminal window which is running Bash. I can copy-paste the Perl script to the terminal & ...
0
votes
1answer
36 views

How to Move Large Number of Files to Original Directories?

I accidentally ran a command that moved the contents of all the subdirectories in my home folder to my home folder. Should I call it a loss and reinstall my system, or is there some command(s) I can ...
24
votes
14answers
27k views

What's a good example of piping commands together?

If you were helping someone to learn the concept of pipes on the command line what example would you use? The example that actually came up was as follows: cat whatever.txt | less I feel like ...
4
votes
3answers
158 views

How do you extract a whole word containing substring?

If I have a file that looks like this: example.png example.jpg example2.jpg example2.png example.swf example2.swf example3.jpg example4.jpg example3.png example3.swf and I want to extract the ...
4
votes
7answers
8k views

Fast tool to generate thumbnail video galleries for command line

I use gframecatcher to generate thumbnail video galleries, i.e. something like this: However this is a GUI tool and I want to create recursively a gallery for every video in a directory structure, ...
39
votes
8answers
129k views

How to determine Linux kernel architecture?

uname -m gives i686 and uname -m gives i686 i386 output in Red Hat Enterprise Linux Server release 5.4 (Tikanga) machine. I need to install Oracle Database 10g Release 2 on that machine. So, how can I ...
31
votes
1answer
1k views

ESC + { : What is it and where I can know more about it?

I was play around at the bash prompt, and pressed ESC followed by { , after which , the shell showed all the files for completion, in a fileglob string. Eg : If I had typed bash C followed by ESC+{ , ...
1
vote
5answers
14k views

check running process

I am new babe to Linux. So please skip to read if you are not patient with beginner. Let's say I am asked to check and shut down the processes that I am not familiar with. So when I ls under bin ...
0
votes
3answers
39 views

How to loop through a file and make each line a new regular expression into an awk statement?

FileA.txt: ATGCATGC GGGGGGTT TTTTT AAAA FileB.txt: asdfasdf blah2 ATGCATGC blah3 blah4 delte-me-too GGGGGGTT blah5 blah5 .... I want to compare the each line from FileA.txt and check if it ...
1
vote
6answers
20k views

How can I output the difference between 2 files?

My file consists of the the following; roughly: username:username:username:username:username The above line continues to about 600 characters. I use the awk command in order to use it as an ...
0
votes
0answers
31 views

augtool saving failed

I am trying to set some parameter using augtool but getting strange error Linux$ sudo augtool set /files/etc/abrt/abrt-action-save-package-data.conf/OpenGPGCheck no error: Failed to execute command ...
0
votes
1answer
17 views

Possible to prevent multitail from closing “finished” command windows?

Assume a multitail call like the following: multitail -s 2 -l "long-running-command" -l "short-running-command" Now, I would like to have both windows remain open, even after they are finished. ...
3
votes
4answers
14k views

Remove ^M character from log files

Remove ^M character from log files. In my script I redirect output of my program to a log file. The output of my log file contains some ^M (newline) characters. I need to remove them while running ...
30
votes
8answers
66k views

Do we have an undo in Linux?

I renamed a few files in one batch script. Is there a way to undo the changes without having to rename them back? Does Linux provide some native way of undoing?
1
vote
4answers
96 views

What command would I use to find out how much total space my hard drive has left?

What's a single command I can run that shows me the total amount of space free on a hard drive? I don't want to do any math, I just want a command that shows me the total free space on my hard drive.
6
votes
4answers
5k views

Passing an argument to multiple commands in a single line

I'd like to be able to run multiple commands on the same file in a single line. The way I currently do this is: commandA file && commandB file && perl -ne '...' file My gut instinct ...
1
vote
1answer
25 views

Linux yum Commands that are Equivalent to these Ubuntu apt-get Commands [closed]

I'm using an AWS EC2 instance and I'm trying to switch from an Ubuntu instance to a Linux (Amazon Linux AMI) instance and in doing so I need to figure out the equivalent apt-get to yum commands and ...
-1
votes
0answers
62 views

Understanding {1},{2},{3},{4}… parameter to parallel [closed]

DISCLAIMER: I am using Mac OSX. The bash script is in a different directory from the files that require processing. From here my struggle begins… HELP 1: I have multiple files each housed ...
10
votes
3answers
14k views

How do I insert a space every four characters in a long line?

I've got a long line that I want to insert a space every 4 characters, on a single lone line of solid text to make it easier to read, what's the simplest way to do this? also I should be able to input ...
0
votes
4answers
57 views

grep match multiple substrings and pass or fail on missing

I have a nginx -V 2>&1 | \ grep -qi 'nginx/1.9.10\|ngx_pagespeed-release-1.9.32.10\|openssl-1.0.2f\|modsecurity-2.9.‌​0' \ && echo "has the stuff we need" \ || echo "missing ...
7
votes
5answers
809 views

How to randomize the output from seq?

I know I can use seq to generate a random list of numbers: 1, 2, 3, 4... I want to get those numbers into a random order like 3, 1, 4, 2... I know I can use shuf to shuffle the lines of a file. So I ...
10
votes
1answer
3k views

Check ping statistics without stopping

Is there a way to tell ping to show its usual termination statistics without stopping the execution? For instance, I'd like to quickly view: --- 8.8.8.8 ping statistics --- 2410 packets transmitted, ...
0
votes
1answer
40 views

Split string into array and print each element on a new line with commandline

I'm having a String which is seperated by commas like a,b,c,d,e,f that I want to split into an array with the comma as seperator. Then I want to print each element on a new line. The problem I'm ...