Bash is a free shell for Unix-like operating systems from the GNU Project.

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Desktop Gone in Centos 6

I had a third party library created a ~ folder (a bug there), and I tried to delete it by "rm -rf ~". And apparently, it is a mistake -- my session got rebooted and then when I went back in, all the ...
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26 views

Need to source bash_profile each time

I have get a server space that runs linux. A user is created for me. I have a bash_profile in my home directory and I set environment variables for JAVA_HOME and JAVA. When I access server through ...
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44 views

Writing a secure login script

I'm trying to write a secure login script to allow a user to have limited access to a server and change particular options. My method for doing so is via a python script executed by the users ...
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34 views

Do functions/aliases defined in a bash script that's downloaded from a server and executed not work?

I had a .bashrc which I moved to server so that I can download and execute it through wget. wget -O - http://xxx.github.io/dotfiles/bashrc | bash It does get executed but any functions and aliases ...
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38 views

how to detect availability of GUI

For Linux: I have a text mode installation (bash) script and a graphical mode setup program (a Free Pascal binary). I'd like to run the graphical setup when a GUI is available. How do I detect which ...
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54 views

xcode install doesn't work from mac teminal

So i'm trying to install the command line tool for xcode, i keep hearing to this xcode-select --install so I get the following output. xcode-select --install Usage: xcode-select -print-path ...
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132 views

How to setup an array to capture output from ffmpeg volumedetect command

If you query a media file using a command such as ffmpeg -i amediafile.mp4 -af "volumedetect" -f null /dev/null you get output including.... [Parsed_volumedetect_0 @ 0x181d0a0] n_samples: ...
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73 views

Command 'at' does not work in one Synology NAS, though it works perfectly on another

I have installed at command on 2 different NAS synology. On 1, it works perfectly, on the other I get the message: Villars1> echo "touch /tmp/tt" | at now next minute warning: commands will be ...
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93 views

Entered wrong .bash_profile and now my laptop is running hot

I am just learning how to use the command line and was editing the bash prompt setting in .bash_profile. I made an error in the prompt settings in .bash_profile and I lost the prompt and the ability ...
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28 views

pidof Xorg is not returning a number on my computer

I'm trying to debug a performance problem with Xorg on my computer and I found a curious problem doing the operf command: pidof -sx Xorg, or just pidof Xorg outputs nothing. But ps -e | grep Xorg ...
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138 views

Bash: move all files in all recursive folders to the root of the volume?

I have a disk with files and folders, a few levels deep. Eventually, there are mp3 files. What I would like to do is move *.mp3 from every level to the root of the disk, and then delete all the ...
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55 views

-t, -T and/or -t -t options for ssh are not stopping stty errors

I've googled this error (which is a pretty common error) ad nauseam, but none of the solutions are working. Disabling pseudo-tty allocation nor forcing pseudo-tty allocation work for me. I always ...
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80 views

curl won't shut up (--silent does nothing)

I'm writing a quick shell script, and I cannot for the life of me get curl to suppress the progress bar. The relevant line looks like this: curl http://website -o $temp >/dev/null 2>&1 ...
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98 views

GNU screen command on path not found

When I use GNU screen in the following way, it works: screen java -jar .... but why does screen bukkit .... not work when bukkit is a executable script from my path ($PATH)? I've read here, ...
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434 views

Wrong exit status from expect script

I developed the TELNET_TEST.expect (expect script ) in order to test TELENT connection on remote machine this script perform telnet on target machine wait for login and send password and make exit ...
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66 views

Bash script for repeated execution of benchmark

I'm working on a project involved with cloud instance performance. Currently running UnixBench on EC2 instances. For comparison purposes I require a benchmark to be run constantly on one instance. By ...
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217 views

screen capture full webpage rendered with firefox or chrome

i'm trying to think of a solution that will let me take full page screen shot of a website via a bash script. so far i have tried gnome-web-photo but it doesn't render the webpages correctly. next i ...
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112 views

CLI tools/ways for dynamically constructed DOM structure parsing HTML Javascript

I'm planning to make a tool which recognizes HTML using DOM structure in CLI. As many sites produce many DOM elements using JavaScript these days, it's becoming difficult to extract information from ...
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218 views

mc-wrapper does not exit to MC_PWD directory

I recently installed openSUSE 13.1 and set up the mc in typical why by aliasing mc with mc-wrapper.sh to have it exit into the last working directory in mc instance. However this does not seem to be ...
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234 views

Batch replace non-ASCII characters in filenames

I'm looking for a shell script that will recursively replace non-ASCI characters with underscore or just remove them. The issue is that a drive with files, created on Linux, has to be used on ...
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27 views

Running Custom commands in a Terminal Application

I am running a terminal application in /dev/pts/X terminal that has its own console as sampleapp> what I need is to run commands specific to this application but from another terminal.
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160 views

How to query mssql db from bash on subsystem for unix

I have a script that is used to query a database and use the result set for further processing. This is a shell script that runs on bash. But the bash used is the one shipped in subsystem for Unix for ...
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213 views

-bash: java: command not found MacOS 10.7.5

I recently "uninstalled" Java 7 because it isn't compatible with Chrome, following the instructions on this site: https://www.java.com/en/download/help/mac_uninstall_java.xml. Then I re-enabled Java ...
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80 views

Bash Script Display Remote Screen Session to User

I'm kind of new to bash scripting and I'm having trouble figuring out how to accomplish this. I'm working on a script that is designed to backup and manage a java application that runs within a ...
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167 views

Open pwd protected http stream in vlc from Linux CLI

Can anyone please advise me on how to open a pwd protected http stream from CLI in vlc? I checked out the --help and man pages, but they seem to offer only syntax for opening ftp, rmt and smb pwd ...
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140 views

cron job monitoring script

greeting of the day!!! please help me a situation, i am trying to develop a script which provides me details which my cron job is commented or stopped which job is running or scheduled. like we ...
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97 views

How to detect the OS type of a SSH client from the remote OS

If I am using PuTTY from Windows to SSH to a remote OS, how do I detect what OS the SSH client is running on, from within the remote OS? I think this is probably impossible. Merely the terminal type ...
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26 views

How to prevent MacVim from inherenting .profile as if it was Bash itself?

I have this guard in my .profile: if [ -n "$BASH_VERSION" ]; then if [ -f "$HOME/.bashrc" ]; then . "$HOME/.bashrc" fi if [ -f "$HOME/.bash_aliases" ]; then . ...
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594 views

FFmpeg unable to find a suitable output format when run from script

I'm trying to write bash script, which I can use to start encode of my video for web player, and also log to file when it started / finished. It looks like this: #!/bin/bash ...
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44 views

ls inside bash script didn't found just created file

bash script contains like: ./java_application ls logs/app.log java_application deletes and creates new log file: app.log when I run this bash script I receive: ls: logs/app.log No such file or ...
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65 views

Why is there a bash process running in my Terminal if I use Zsh?

When I run the "top" command on OSX Mavericks, a bash process appears even though I am using Zsh, why?
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33 views

Logging/debugging the bash startup process

My bash shell sometimes takes quite a while to start, probably due to a lot of stuff happening in my various dot files (e.g. .bash_profile, etc.). Is there any way to properly log the bash startup ...
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79 views

Can’t set color of vim

I've asked same question to stackoverflow but It evaluated offtopic at stackoverflow. http://stackoverflow.com/questions/23667728/cant-set-color-of-vim?noredirect=1#comment36357524_23667728 If it ...
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50 views

Bash Prompt : incorrect time displayed

Using the following prompt: export PS1="\n[$(date +%d-%m-%Y)] \u@\h [\t]\n{\w} [\!] # " and with TZ to my timezone : echo $TZ = America/Montreal The time on the prompt is OK at the start of a ...
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216 views

Linux Mint 16 32-bit (Ubuntu) forgets password, even after resetting via grub/bash trick

I just installed LM16 using a live USB stick. Install went fine, and at the user step I made a password but chose 'log in automatically'. On first boot without the usb stick, it logged in without ...
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70 views

Autoexport bash internal variables

I need to access to some bash internal variables (BASH_LINENO, BASH_SOURCE) from a command invoked by a shell script. The only possible interface between my command and the script are environment ...
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112 views

Bash History Under OS X (Mavericks)

Why does my bash history under OS X never seem to persist for more than an hour or two (or a day, at most)?
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102 views

GZIP corruption with big files?

I came across a weird behavior: gzip v1.5 - Fedora r18 A file -rwxrwxrwx. 1 root root 3892576256 Apr 28 11:29 vm.qcow2 Initial checksum: md5sum vm.qow2 954c5461468d68daed3cef6a7b66bd8f vm.qcow2 ...
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102 views

Specific command not recognized in only one shell

I'm running Windows7 as OS as my development machine. It has various Shells: cmd Powershell Mysysgit GNU Bash <-- this is the one not working PuppetLabs Shell Nodejs Shell PHPStorm built in ...
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291 views

FFmpeg/Avconv: Scaling Filter “Error when evaluating the expression”

I'm trying to scale a video with FFmpeg with the following command: ffmpeg -i input.jpg -vf scale="'if(gt(a,4/3),320,-1)':'if(gt(a,4/3),-1,240)'" output_320x240_boxed.png This is taken verbatim ...
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189 views

Unable to run tmux on OS X

So I got brew on my mac and I had tmux installed and running just fine. Then after I refreshed my system every time I try to run tmux i get this error: "-bash: tmux: command not found" So since I'm ...
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16 views

getting disk identifier from the disk name

Is there a way to retrieve the disk identifier from the disk name? For example I have a disk partition /Volumes/Data and I would like to store the disk identifier in a variable. Any help?
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302 views

Kali Linux: Renaming files in bin

I'm just curious. I want to rename files in /bin such as - ls --> als //after I change it, the ls command no longer works and I have to use als instead - adduser --> aadduser - chmod --> achmod so I ...
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87 views

how to list all CNAMEs of the current server in the bash prompt?

I have servers with a generic names (e.g. eu1.example.com) which has a set of useful CNAME (e.g. mail.example.com, rocket.example.com). How can I list the CNAME in a bash prompt, to go from ...
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1k views

setting https_proxy environment variable in a secure way

The following is the standard way suggested to set the environment variable for the https_proxy: export https_proxy=<username>:<password>@<proxy>:<port> But it clearly ...
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46 views

Copying .bashrc and .profile does not change anything?

I have a root bash profile setup which has autocomplete and all the nice colours, but there is nothing setup for my actual user (non root). So I decided to copy the files .bashrc and .profile from ...
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267 views

How to check via bash if your connection is wireless N/G/… on Linux?

iwlist scan shows me the available wireless connections. I can see Frequency:2.412 GHz for the channel I'm connected to. This article shows that a frequency of 2.412 GHz means that you are using ...
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43 views

open a new screen in linux, no access to perl local library

I added my perl local library to my shell startup script (.bashrc) and when I start a terminal in linux: $ echo $PERL5LIB /home/perl5/lib/perl5:/usr/share/vcftools/perl BUT when I open a new ...
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131 views

Mac OS X Terminal Error: undefined method `grep'

Every time I enter a command, or even just hit enter, in Terminal I get this line below the output: -e:1:in `<main>': undefined method `grep' for #<String:0x007feea31354b8> ...
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52 views

automatically prepend variable in for loop without having to put variable on each line

Is there a way to automatically have the $i variable prepended to the beginning of the command without having to specify it each time? Here is my current script. #!/bin/bash for i in "command ...