A shell is software that lets users interact with the operating system, usually by typing at a command-line.

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virtualbox increase cpu cores script wise

1x cpu core is not enough for an SMB filesharing Ubuntu box. How do we poweroff the VM at midnight, increase the cpu cores 1->2, and power on that box (script-wise)? (it's a windows host... but ...
2
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1answer
30 views

Easily print out a spaces between larger data outputs in bash

I'm grepping through a very large web directory, and when I do multiple greps in a row, when scrolling up, it is difficult to tell when one result ends and an other one starts. I tried just clear, ...
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2answers
146 views

How to run an infinite loop program on startup on a raspberry pi without halting boot up

I have a shell script: #!/bin/bash while sudo /home/pi/MyCode; do :; done echo Error with MyCode which runs a program in an infinite loop. I want to set up the shell script to run at start-up ...
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1answer
47 views

How to use the awk to print the output

This command nstats gives me output like below. How can I use awk or grep to give me the uptime with only days on it? I cannot use the "" to get the output. HOSTNAME LOAD MEMORY SWAP PROCS ...
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4answers
45 views

How do I close stdin in a shell script?

I have a misbehaving program that I need to call from my script. It exits as soon as it sees something on stdin. Is there a way to close stdin?
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1answer
20 views

what's the way to explicitly provide memory to shell script?

How can I give a shell script specific amount of memory to run? If I run a java program I can use -Xmx. But what if it is a shell script?
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3answers
39 views

Moving folders in Linux inconsistency

I have a shell script that deploy an application to a staging server. However, one of the application's directory needs to be backed up and restored after the deployment (so it is not overwritten). I ...
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2answers
523 views

Shell script to SFTP file to remote server

This is probably a question asked before, but I can't find a good question/answer. I need to write a shell script that will be called by PHP program (exec function) to move all *.pdf files to a remote ...
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3answers
84 views

Why is this echo command not working?

I want to overwrite /etc/postfix/master.cf with my own content. I'm using echo "<content>" > /etc/postfix/master.cf to try and accomplish this. But when I do: echo "# # Postfix master ...
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2answers
167 views

How to execute multiple multiline mysql queries with a shell script?

I want to run multiple MySQL queries from a shell script. I'm using the following code: mysql -u <redacted> -p<redacted> servermail << EOF CREATE TABLE `virtual_domains` ( `id` ...
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2answers
26 views

followup: why are shebang files not suid-able?

followup question to http://unix.stackexchange.com/questions/364/allow-setuid-on-shell-scripts . there is a very good answer by Gilles. alas, I do not understand it. nothing described there seems ...
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1answer
79 views

Can't start new fish session after incorrectly closing fish_config

I'm trying out fish (the friendly interactive shell), and tried out the browser-based config with fish_config. I didn't close this correctly. I hit ctrl-C in my shell. Now I see the error "The ...
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0answers
23 views

Keep tclsh open after running script through notepad++

I'm currently writing a tcl script using Notepad++. I've edited the F5 key such C:\TCL\bin\tclsh.exe "$(FULL_CURRENT_PATH)" This will open a tcl shell & run the current script I am writing. I ...
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3answers
53 views

How to remove file modification tracking on an Emacs buffer?

I have a *shell* buffer in Emacs where I get a Linux command line shell interface. On occasion, I wish to save the buffer's contents to disk for future reference were my session to exit and once ...
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2answers
86 views

How can I colour-code files and directories in my shell environment?

I've seen many screencasts online in which the files and directories are colour-coded differently for ease-of-use. I'd like to achieve the same on in my bash terminal, on OS X 10.9 and using iTerm2. ...
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2answers
164 views

linux shell command to grep Unicode Character 'ZERO WIDTH SPACE' (U+200B)

How can I grep for Unicode Character 'ZERO WIDTH SPACE' (U+200B) in linux grep '%U200B' filename?
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4answers
1k views

Shell script: ssh to remote machine, then exit: 'exit' does not work

I have a shell script of the following type: #!/bin/bash ssh mylogin@myremotemachine.com echo "Hi" exit I run it locally to do something on a remote server (represented by 'echo "Hi"'). However, ...
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0answers
52 views

Netcat redirect remote console application

I have a windows interactive command line application ('pianobar', Pandora client) that I'm running on a Win2k8 server that I would like to control remotely, possibly using netcat. I need to be able ...
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3answers
48 views

How to find length of string in shell

i need to calculate it using pure sh shell only. What happening is /bin/sh is actually a soft link to bash or other shell.Hence ${#STRING} gives length of string as it is advance bash feature. Can ...
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0answers
245 views

sqlmap os-shell help needed

I am asking this question just for educational purposes. I run this command to upload php shell: ./sqlmap.py -u http://target.com/myfile.php?id=1 --os-shell And it succeeded: The shell uploaded ...
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0answers
15 views

how uninstall video card driver(integrated) in linux with shell command

Here is my problem: I was trying to update a new video card driver for my computer's Intel integrated display card, but the command " modprobe -r " return module is in use. I try to disable the ...
2
votes
1answer
40 views

Surpress execution trace for echo command?

I'm running shell scripts from Jenkins, which kicks off shell scripts with the shebang options #!/bin/sh -ex. According to Bash Shebang for dummies?, -x, "causes the shell to print an execution ...
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1answer
12 views

How to send process in background which has not started from shell?

I know how to send process to background and foreground which has started through shell using bg and fg commands. How can I send process which has started by clicking icons or menu? like I open ...
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1answer
22 views

How can I run `M-x compile` under a particular shell in emacs?

I've a piece of software that can only be compiled under my-weird-sh. I like to use some-better-sh in my day-to-day work, so that is my login shell (via chsh). This changes the shell in Emacs to ...
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1answer
51 views

What does this zsh for syntax mean?

I working on source controlling my dotfiles and a lof of what I'm doing is based off of Zach Holman's dotfiles. I want to source all zsh files like he does in his files but before I just throw the ...
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1answer
407 views

OneDrive Subfolder Icons Keep Resetting

I'm having a frustrating time with my OneDrive client where, when I customize the shell icons for subfolders inside my cloud drive, it resets the icon to default upon synchronization. As frivolous as ...
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1answer
30 views

including timestamp in file name

I tried to create a file like this to put a timestamp in the file name vim Customer1-$(date).txt The result was Customer1-Sat.txt, however, I wanted the full timestamp Sat 30 Aug 2014 09:41:27 PDT ...
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1answer
50 views

How do I make sure that bash (not tcsh) is used in Linux?

I have a bash script where I use ssh to connect to another server and run some commands there. I found some sites that the error (Warning: no access to tty (Bad file descriptor). Thus no job control ...
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1answer
24 views

What's the soonest I can send a signal to a background process (trap)?

I have a script from which I run a second script in a subshell. What's the soonest that can send a signal to the second script? script1: ./script2 & kill -SIGCONT $! script2: echo "~~ ENTRY" ...
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1answer
51 views

Shell, subshell, source, background process, PID == confusion

I am trying to get my mind straight as to how all these things are put together. For example with this script: #!/bin/bash . script1 ./script2 . script3 & ./script4 & sleep 5 How do the ...
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1answer
22 views

why following shell script function failing?

_exec() { CMD="$1" echo "Executing command: $CMD" EXEC_OUT=`$CMD` EXEC_RET=$? } _exec "hostname|cut -d\".\" -f1 " SHORT_NAME=$EXEC_OUT if [ $EXEC_RET -ne 0 ];then echo "Unable to ...
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1answer
68 views

How do I build a script shell to send cmd via telnet and log only results?

I would like to make a shell script that can call a range of IPs via telnet, to send a command, and write the result to a file.
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1answer
101 views

Monitor process start time, end time using shell script

I am working on project in which we execute shell script which invokes the Node process and further processing happens. I want to design a script which should log the start time, termination time of ...
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1answer
42 views

'dd' command on Damn Small Linux?

I looked at the package list of DSL, and I don't see 'dd'. For example I would like to restore /dev/sdb from an .img file like so: dd bs=1M if=/home/myname/image.img of=/dev/sdb What command do I ...
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0answers
19 views

Showing context menu option if extension is not .aent

I have made an application that can basically encrypt anything, I have added a registry entry in HKEY_CLASSES_ROOT/*/shell/ so that it's shown whenever one right clicks a file. but I don't want to ...
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1answer
36 views

Default prolog for all ZSH scripts?

I have a file that contains several helper functions, meant to be used only in other ZSH scripts. I do not want them to be loaded with my profile. To make these functions available in my script, I ...
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1answer
28 views

Weird output in my mac iTerm bash shell. How do I make it clean?

Setting up my bash and made some mistake. Here is my bash shell: android-c26f663baae722eb:~ okyretina$ I have used a clean .bash_profile and sourced it and the shell still have that weird ...
2
votes
1answer
114 views

Default shell for running scripts (w/o shebang) in macos?

I have ZSH as default shell in MacOS, everything is working fine. ZSH is installed as brew package, Ive set default shell in my account, new shell is listed in /etc/shells... everything is set, like ...
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0answers
98 views

Automaticly run xinit from rc.local as different user

I'm working on some tuning of my raspberry pi b+. So I decided that midori should start automaticly after autologin. With startx it works without problems, but X is still to ressource hungry. So I'll ...
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0answers
27 views

cygwin programs returning errorcode -1073741819 on Windows 7 cmd

Sometime in the last week or so none of my cygwin programs are running from the cmd shell of Windows 7 64-bit. Tried rebooting and reinstalling fresh, but with same results. After further analysis, ...
2
votes
3answers
77 views

Why is this sudo command try to run in /root?

I try to run a sudo command via SSH like this: ssh domain.com sudo -u user bash -c "cd /home/user/ && ls" (which is obiously just an example). I get back: /home/user/: line 0: cd: /root: ...
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1answer
27 views

How to get when run `top` command ports listed?

How to get when run top command ports listed ? I get info about process but I need port to see ( process dies very quickly , 0 seconds, and I cannot grep after ps aux ). Is possible to top command ...
0
votes
1answer
102 views

concurrent scheduled jobs and ora-27477

Need: To have Oracle kick off a shell script that performs processing on tables and data in the Oracle database. The script is instantiated by specific activity from web clients. Issue: Web clients ...
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2answers
57 views

is there anyway to get remote shell from windows to windows over WAN? [duplicate]

Is there any way to get remote shell (not RDP) from home PC to office PC? i have 2 pc's on 2 different places pc number one ip : 66.33.22.885 ( home PC ) pc number tow ip : 77.13.85.676 ( office PC ...
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2answers
72 views

SSH Connection refused wrong port

I want to connect to remote server through Ubuntu shell. I am using ssh root@serverIP in Ubuntu shell but I receive this msg: connect to host xxx.xxx.xx.xx port 22: Connection refused This IP is on ...
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0answers
23 views

How to batch download wikipedia pages as pdf?

I have a list of wikipedia pages that I'd like to keep updated in pdf format. What would be the easiest way to do this? The ideal workflow for me would be something that I can put into a shell or ...
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5answers
60 views

History in bashrc on login vs manual sourcing - clearing and loading

I use a bunch of different aix machines at work and need to share users with co-workers. To make my life easier but not bother others with my customizations, I have created a .bashrc file that I copy ...
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1answer
34 views

Hide all output from a background process

I have a bunch of commands in my zshrc which invoke another command in the background. The background command is an alias to a text-to-speech program (I use it to give me audio cues when processes ...
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1answer
66 views

Memory usage of a process in a shell script

I want to find out the memory usage of a process in a shell script.I tried to use this piece of code : while[process] do if [ -e /proc/$pidno/statm ]; then m=`awk '{OFS="\t";print ...
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1answer
40 views

How to extract certain database from full Mysql dump?

I have regular backups of my mysql server.For convenience I set it up as a single Mysql nightly dump. Now I need to restore one of the databases from the dump. How do I restore a single database ...