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

learn more… | top users | synonyms

0
votes
0answers
2 views

How do I recover from a `tmux a` by mistake within a tmux session?

I have a tmux session with a pair of windows. I want to recover the stdout from both those windows. I found this example, and so, within my existing attached session, ran tmux a. I now have a screen ...
0
votes
1answer
6 views

List folders by modification time of children in linux?

I have a folder, we'll call it /scripts/, that contains subfolders for a number of different scripts (let's say /scripts/file_export, /scripts/record_ingest, /scripts/stats). Inside these folders are ...
2
votes
1answer
14 views

Change puTTy presets via registry

I am fixing presets through the .reg file instead of in puTTy because I am going to make this an open source registry. Mostly changing themes, and my school doesn't know what the hell they are doing ...
2
votes
1answer
11 views

Pipe standard error to file and keep it on standard error?

I have a script (fragment) for which I'm logging output and standard error: #!/bin/sh #... { date "+%Y-%m-%d %T" cd $workdir ls -ltr validfile badfile #example command that provides stdout, ...
0
votes
0answers
4 views

detox not removing all whitespace

Here's a process that is giving me some trouble. Hope you can help: I unzip a file generated by system X. All files have white spaces interspersed in the file name. I use detox to remove the white ...
1
vote
1answer
28 views

Bash - list files within date range

So far I've been basing my efforts around this blog and have come up with: startdate=”201407010000? enddate=”201408010000? touch -t $startdate ./startdatefiles touch -t $enddate ./enddatefiles find ...
0
votes
0answers
19 views

Batch arguments for SSH Secure Shell in Windows 7?

I installed SSH Secure Shell to connect to my remote server, and I want to automate the process of updating my website. I was going to make a batch script to automatically push and pull from my site ...
1
vote
0answers
27 views

How can I efficiently filter Dos packets? [duplicate]

I have recently been the victim of some Dos attacks. The facts : I received a very high amount of packets saturating my connection and preventing me from accessing the Internet during one hour ...
0
votes
2answers
22 views

How to make a copy of file in the same directory

This creates a file in the same directy as 'some.file.bak'. find /home/ -ipath "*/temp/some.file" -type f -exec cp {} {}.bak \; How to make a copy in another name such as 'another.file' in the ...
0
votes
1answer
13 views

Relative Path in Chain of Process Call

I have a Java program which executes a bunch of python and shell scripts, which in turn will call some other python/shell scripts. If I use relative paths in any of the scripts, would the paths be ...
0
votes
0answers
7 views

How to run pip in non-interactive mode?

Most of tools I'm using have some mode (often ON by default) where they ask me zero questions while running the command. apt-get is an example close to pip. There's -y option which makes it ...
0
votes
1answer
11 views

Bash expansion to list from a directory

I tend to work on multiple projects, all stored inside my home (~) directory inside a directory called web. At one point all my projects were inside a single directory inside this; so to move from ...
2
votes
1answer
53 views

How to diff the redirection of two commands in a shell script

in the command line I can diff the output of two commands with $ diff <(cmd1) <(cmd2) but if I put this in a shell script $ sh do_two_comands_diff.sh It does not work $ diff <(ls) ...
0
votes
2answers
41 views

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
votes
1answer
22 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, ...
0
votes
1answer
55 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 ...
0
votes
1answer
23 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 ...
0
votes
3answers
14 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?
0
votes
1answer
19 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?
0
votes
3answers
34 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 ...
0
votes
2answers
47 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 ...
0
votes
3answers
39 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 ...
0
votes
2answers
46 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` ...
0
votes
2answers
20 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 ...
1
vote
1answer
40 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 ...
0
votes
0answers
7 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 ...
1
vote
2answers
26 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 ...
0
votes
2answers
51 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. ...
0
votes
2answers
61 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?
1
vote
4answers
246 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, ...
0
votes
0answers
25 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 ...
0
votes
3answers
39 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 ...
0
votes
0answers
45 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 ...
0
votes
0answers
10 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 ...
0
votes
1answer
15 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 ...
0
votes
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 ...
1
vote
1answer
17 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 ...
2
votes
1answer
35 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 ...
0
votes
1answer
97 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 ...
0
votes
1answer
26 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 ...
0
votes
1answer
28 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 ...
1
vote
1answer
19 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" ...
1
vote
1answer
24 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 ...
0
votes
1answer
21 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 ...
0
votes
1answer
37 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.
0
votes
1answer
45 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 ...
0
votes
1answer
27 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 ...
1
vote
0answers
18 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 ...
0
votes
1answer
30 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 ...
0
votes
1answer
23 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 ...