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

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Finding out what Linux I'm running [duplicate]

Possible Duplicate: Bash: Get Distribution Name and Version Number Is there any consistent way of determining the Linux Distribution / Release that a machine is running if you don't already ...
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4answers
1k views

Which stream does Bash write its prompt to?

I am trying to redirect all output from bash (prompt, user input, results) to a file Example: /bin/bash > file.txt 2>&1 I thought that would work, but I'm not getting the prompt. Can ...
2
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2answers
400 views

Detect bad USB cable

Is it possible to detect with confidence via command line that the USB cable is damaged? I tried to connect my printer and it's not printing with this cable, I guess that the culprit is the USB cable. ...
9
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2answers
255 views

What is not shell specific?

Under some answers, I see comments that recommend avoiding shell specific commands in answers. How do I know which commands, operators, etc exist in all shells? Is there a list of standards? man ...
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3answers
10k views

How to use /dev/fb0 as a console from userspace, or output text to it

So I have a Palm Pre (original P100EWW) model that I enabled developer mode on, and installed a Debian Squeeze chroot. Works great. I have plans to use this for ANYTHING (bittorrent peer, web ...
9
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3answers
458 views

syntax_highlight <source_file> | lpr

Does anyone know of a simple way to produce the PostScript corresponding to a syntax-highlighted version of a source file that can be piped directly to a PostScript printer? As the wording of the ...
7
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3answers
5k views

How do I grep without leading whitespaces?

I'm greping through a large codebase, and leading whitespaces and tabulation seem to be quite annoying. Is there any way to get rid of it? grep -R "something" ./ E.g, instead of: foo/bar.cpp: ...
7
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4answers
3k views

Make cd automatically ls

I find that I often do the following: %> cd bla/bla %> ls I would like it that whenever I cd into a directory it automatically does an ls. I fiddled with my .bashrc for a while, but couldn't ...
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4answers
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Is there a simple linux command that will tell me what my display manager is?

Is there a simple linux command that will tell me what my display manager is? I'm using Xfce. Are different desktop environments usually affiliated with different display managers?
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1answer
318 views

Removing redirection operator does not change output. Why?

I saw this usage of redirection somewhere, and thought it was a typo: grep root < /etc/passwd But after I run it, I saw that it gives the same output with grep root /etc/passwd: $ grep root ...
2
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2answers
1k views

Home key not working in terminal

I am using GNOME Terminal 2.7.3 and zsh 4.3.9 (x86_64-unknown-linux-gnu) Home and End are not working. Nothing happens and nothing gets displayed when I press them. but they work when I press shift + ...
2
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3answers
263 views

Execute and renice a process in one command

Does anyone know if it's possible to execute and renice a process in one command, i.e. without having to look up the command in the list of processes using the ps command and then renice that ...
6
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2answers
522 views

What commands have -h human readable option, and how can I enable it by default w/env variable?

I'm tired of using aliases or typing -h. I want human readable output 24/7. Is there a way to enable it all the time for all commands that offer it?
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2answers
10k views

Command to install linux headers fails

I need to install my linux headers for an Nvidia driver install. But I get an error when doing so: peter@peter-deb:~$ sudo apt-get install linux-headers-$(uname -r) Reading package lists... Done ...
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0answers
96 views

Seeking command-line example for adding images to MP3 files [duplicate]

Possible Duplicate: Searching for a command line tagging tool for mp3 and ogg that supports pictures Anyone have a command-line example illustrating how to properly embed an image (for ...
2
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4answers
5k views

How to display line number while doing grep on a file

How to display line number while doing grep on a file. For example: grep CONFIG_PM_ADVANCED_DEBUG /boot/config-`uname -r
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5answers
3k views

How to soft kill gui applications via terminal?

Is there a way to close a GUI application in friendly "please quit yourself now" way, without graphical access to the applications window? For example, if Gnome/X display crashes to black, I'd like ...
20
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2answers
4k views

How can I display syntax highlighting on a file?

Is there a variant of cat that outputs syntax-highlighted lines of code when used on a source file? An idea: maybe vi[m] or another editor can be asked to dump the syntax-highlighted contents of said ...
4
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2answers
908 views

What is the “caller” command?

I'm running Ubuntu 10.10 with openbox running on top. I noticed today a command called caller, however there is no man page, it does not respond to any input (or --help) and whereis doesn't find it. ...
2
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4answers
350 views

sudo to remember password for list of commands?

Is there a way in Linux to make sudo command to remember the password the user entered for in the first of the lines? For example, for a list of commands that the user has to enter, the some of then ...
9
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2answers
2k views

mv a file without breaking a symlink to that file

Is it possible to mv a file w/out breaking a symbolic link to that file? My initial response to this is no, and I'm working out a script based solution to change the links immediately following the ...
5
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4answers
143 views

Change command-line “environment” to programs command

In a console, is it possible to change into a commands "environment"? To explain, I take "git" as an example. While programming and using a git repository, I change to the repos path and then do many ...
2
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3answers
847 views

Recommended Resources To Get Started With Terminal-Only Linux Server?

I want to try to setting up a headless (terminal-only) Ubuntu Linux server, and am trying to find resources to get started. I've been a GUI Linux/Windows user for a while now, and have run through a ...
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2answers
1k views

How to prevent my screens from dimming (going black) from the command line

In KDE, there was a system setting where you could specifically set the monitors to never go black. Now I've switched to dwm and (it might not be related) my screens dim after about 10 minutes. How ...
6
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3answers
908 views

Use `less` to view comma-aligned data

I have a big CSV file. I would like to view my file using less or some command like it which doesn't have to read the whole file at once to show me part of it. Is there a command out there which can ...
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3answers
10k views

How does the “tail” command's “-f” parameter work?

$ tail -f testfile the command is supposed to show the latest entries in the specified file, in real-time right? But that's not happening. Please correct me, if what I intend it to do is wrong... I ...
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2answers
79 views

Handling an option-like filename in the shell [duplicate]

Possible Duplicate: How do I delete a file whose name begins with "--"? Due to mismatched switches when I was trying to run a command, I have a log file named -w in a directory. I ...
4
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3answers
430 views

GNU: Delayed jobs Queue

Is there a simple way for me to add a shell command to a list of jobs to have run on the system when I'm not logged in? For example: I SSH into my system, decide that I want to read an ebook later, ...
3
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1answer
505 views

Keyboard input not displayed on the screen?

We use the `exceed tool to connect to our UNIX servers, but sometimes the command-line behaves erratically. When I am typing some command on the command-line, nothing happens -- nothing is displayed ...
3
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1answer
3k views

command line tool to set time zone

In Centos 5.x there is the text mode interface of system-config-date to set the time zone. Although that utility still exists in Centos 6 the text mode is gone. Is there anything similar in Centos 6?
4
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1answer
792 views

Is there a tool in linux that allows multi-line regex expressions?

I'm wanting to find the results of a multi-line regular expression in linux. I tried grep, but like most linux utilities it's line based. Is there something similar that allows me to search across ...
24
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3answers
8k views

How can I “relink” a lot of broken symlinks?

I have a directory tree which has a bunch of symbolic links to files under /home... however, I have moved /home to /mnt/home and need a way to "relink" all of the symlinks. Does such functionality ...
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1answer
127 views

How can I display file info of a man?

I know when you are in a man page it will display the file name at the bottom inside the man. How can I do the same thing manually?
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1answer
1k views

How to run my own program without specifying its path

Let's suppose I have compiled something and I run it like so: $ /path/to/my/executable/mycmd Hello World What do I need to do to run it like $ mycmd Hello World from everywhere in my computer? ...
3
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1answer
1k views

How do I add ncmpcpp search results to the current playlist?

Using the ncmpcpp MPD client, in the search function (F4) how can I add all the search results to the current playlist short of adding each item one-by-one? For example, say I search for all music ...
2
votes
1answer
299 views

rotating buffer type file logging utility

I'am trying to debug a server that throws a lot of logs on stdout/stderr. I need to redirect only last N lines to a file. Something like a rotating buffer feature there in tcpdump's -C & -W flags. ...
3
votes
1answer
2k views

Convert a folder of images into a multi-page pdf file usind command line tools?

I have a folder with 100 jpg images. I want to convert these images into a multi-page pdf file, with all the images (cropped to A4 size). They are already in the correct rotation. Which tools should ...
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5answers
2k views

How can I run `watch` as a background job?

When I run: watch 'cmd >> output.txt' & the job gets suspended by the system: 3569 Stopped (tty output) Is there a workaround?
2
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3answers
863 views

Change character position with sed

The file contains: dateutkfilename25012009 I want to change the position of character 16th to 17th with 18th to 19th. And then change position of character 16th to 19th with 20th to 23rd... so it ...
2
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2answers
3k views

Add carriage return to output of `tail` while using `grep`

I'm looking to refactor the following command: tail -f production.log | grep -e "Processing " -e "compatible;" -e "Completed in " -e This is the output of the command: Processing ...
2
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2answers
820 views

creating simple command for sudo apt-get install?

I need to run these commands very often: sudo apt-get install <package> sudo apt-get remove <package> Can I make it simple like: install <package> remove <package> I ...
4
votes
2answers
5k views

How to list ALL directories according to their size? [without including the parent directory]

I have a bunch of random folders, some of them are hidden (beginning with a period). I want to list all of them, sorted by their sizes. I have something on the lines of this in mind: ls -d -1 -a */ ...
7
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4answers
548 views

How can I find a file whose name includes a given string, such as “abcde”?

Within a set of directories, how do I find a file whose name includes a given string, such as "abcde"?
10
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2answers
1k views

Where has the trailing newline char gone from my command substitution?

The following code best describes the situation.  Why is the last line not outputting the trailing newline char?  Each line's output is shown in the comment.  I'm using GNU bash, version 4.1.5 ...
5
votes
1answer
489 views

stdin/stdout names in BASH?

I have a program that takes a -o log_file option, which writes extra data to log_file. Is there any way for me to redirect that to stdout? i.e. is there a "special name" for stdout that can be used ...
5
votes
1answer
2k views

SWF to PDF conversion

Are there any tools for converting SWF to PDF? I have a bunch of SWF files (to be ripped from the web) and I'd like to group them into single PDF.
5
votes
4answers
520 views

Equivalent of forward/back buttons for unix shell (when navigating directories)?

I'd like to be able to type in terminal commands of forward/back especially if I went from a directory with a super-long name to home (and want to return back to the directory with the super-long ...
1
vote
1answer
373 views

Command-line way of send pinging

I have lots of Drupal powered website. Each of the website has Multiping module to pinging ping server. Is there any way of send pinging through command-line? I hope I can build dedicated server for ...
3
votes
1answer
322 views

Conditionally killing a process based on its output

I have a REPL (read-eval-print-loop) for the Clojure programming language listening on a network socket. I can send it code over the network and the code will be evaluated and the answer sent back to ...
9
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2answers
570 views

What languages are used to build Unix commands?

Examples of commands I'm referring to are ls, pwd, and cd. Also, how are these built? Do you have an example?