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

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3answers
28 views

Parameter substitution in sh -c

I have a large number of log files, the idea is to group them by date/month and then pack into archives. Here's my script: find /c/this/path/ -type f -name "$file_pattern" | xargs -I fn basename fn ...
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1answer
46 views

Bash script to store words from file in different variable [closed]

I have a need to store words form file in different variable. Like I have a file test.txt containing below content: uname : null empty amarjeet sharma ver : null 1.2 empty 1.3 1.4 txn : null 123 ...
1
vote
1answer
106 views

Execute script on login Fedora 21

I'm trying to launch a script located in my home directory when I login on Fedora 21. I have tried to make this desktop file in /usr/share/autostart [Desktop Entry] Type=Application Name=Wallpapers ...
1
vote
1answer
24 views

Why is bash adding spaces and stretching out filenames in Arch Linux?

My Arch Linux laptop is creating some strange output when using bash. It puts spaces between characters and stretches out files names. I’ve tried to remove/reinstall bash-completion but nothing ...
7
votes
1answer
651 views

What is a safe ping frequency without it being considered a DDoS attack?

I am trying to chart the uptime of a server by regularly pinging it and Google and then comparing the ping times. I want to keep doing this over a period of—let’s say—a week. I am sending a set of 5 ...
1
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2answers
27 views

How to make sed print to the end of line from socat

I have a server which sends data in a UDP Broadcast on port 10552. The data is 7 numbers separated by commas as so. 5.351204,0.001968,-0.000473,-0.999222,0.000451,0.001455,1.084310 I fetch this ...
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0answers
27 views

etherwake fails to run when ran by cron

I have a cron job to check if a client is connected to my VPN and then wake up some other computers on my network using etherwake. I have the script running every minute and it is actually running ...
2
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0answers
19 views

Can one start shell from save file dialog

Using ubuntu. If one tries to print to a file, the save dialog opens. Is there a way one can execute the shell (or terminal) from the save file dialog file name entry box?
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1answer
46 views

Is there a way to run a specific script with every “halt” and “reboot” command on Linux?

I need to find a way to somehow intercept the halt and reboot commands and execute different actions via shell script before the actual halt and reboot commands are executed. Is that possible without ...
2
votes
1answer
54 views

No available formula for “pdfunite” in Homebrew?

I am on Mac OS X 10.10 (Yosemite) and I am new to Bash. I am trying to install pdfunite. I installed Homebrew and ran the following command: brew install pdfunite And I received Error: No ...
0
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0answers
13 views

Can a subprocess launched from a parent executable access the memory of its parent?

Given a system() call with user controlled input, is it possible to read the virtual memory of the parent program? Assume that the system call is made with dropped privileges, and that running ...
1
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0answers
43 views

cp: cannot stat error - when filename has Asian characters

I am simply trying to copy files using cp -r /home/user/source/ /home/user/destination/ but it throws me the cp: cannot stat /source/filename.xxx error for some of the files. When I searched for this ...
1
vote
1answer
33 views

Escaping asterisk * in Bash on Windows

The following command works in GNU Bash on FreeBSD but not in Git Bash on Windows: curl -X PUT https://example.com/_config/cors/origins -d '"*"' The intended result is to send a PUT request to ...
0
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0answers
21 views

Readline stops working randomly

For some reason every 1-3 hours (depending on work load) my shell read command stops accepting input and hitting return renders the ^M character. Something like: Continue? After answering: ...
0
votes
1answer
29 views

Why is grep missing missing matches when searching multiple directories?

Trying to grep the files in several child directories, grep returns nothing. ~/box/raw $ grep ":2259\"" f*/hh*.adt ~/box/raw $ But when I descend into one of the child directories, grep finds a ...
1
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0answers
52 views

How to download files from Website using bash [closed]

I am trying to download a collection of files from a website. Where the collection is drawn from "TAGS". I have tried using many combinations of wget and bash scripts with no luck. Each file is nested ...
0
votes
1answer
26 views

Unix/linux shell scripting floating point division

I have to divide two floating point values and store it in variable. My code below v_missedvol=4003.03 v_allvolume=3003.03 v_vol_temp= $(echo "$v_missedvol / $v_allvolume" | bc -l ) the result ...
1
vote
2answers
53 views

How to redirect output to file that has slash in name

I want to create a file named ./https://www.example.com, but the following doesn't work: [ ~]$ URL="https://www.example.com" [ ~]$ echo "Hello!" >"$URL" bash: https://www.example.com: No such file ...
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0answers
22 views

monitor command outputs in separate windows within a terminal

For a list of input text, I want to execute a repetitive command using each element from the list. In addition I also need to monitor the results of each of these commands in parallel. So I am looking ...
1
vote
1answer
41 views

How to daemonize a bash script only if --daemon flag is given?

I have my script.sh and want to run it with ./script.sh or ./script.sh --daemon, having it remain in the foreground unless the --daemon flag is given, in which case it should detach and go into the ...
0
votes
1answer
55 views

Output of the ps command and understanding the flags

Ubuntu 12.04 LTS using bash. I tried running the ps command from a Java program using the Runtime and got some unexpected output. Upon closer inspection I realized that it was the output of: ps ...
0
votes
1answer
23 views

How to include a call to ncat to a bash script?

I need to flush a memcached instance from a bash script, I found the following command which do the job: echo 'flush_all' | ncat localhost 11211 But my problem is that the script doesn't continue ...
0
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2answers
53 views

sh -c in background

Original version: How to run sudo sh -c "command" in back ground In a terminal sudo sh -c "command" & starts in background but as soon as I press enter, the process exits [test@localhost ...
0
votes
1answer
84 views

How can I delete the content between two tags in a large xml file (>2GB)

The File in Question is XML but I want a Shell Script to remove all the binary (Base64) encoded images that are embedded. The files are generally huge (>2GB). I want to delete everything between: ...
0
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0answers
18 views

Mac terminal lost git knowledge

When I opened terminal and went to a git repo, it would automatically show the branch I'm on with a big green check or red X if I had any changes. Logged onto machine today and my bash profile was ...
0
votes
1answer
27 views

Wget not getting cookies, not pulling back results in check.

I'm having a couple of issues when porting check scripts between a couple of servers. The script. #!/bin/bash hostname=$1 port=$2 retstatus=0 retStr= st=`date "+%s.%N"` if [ $# -ne 2 ]; then ...
0
votes
3answers
55 views

du -sh : I don't get why these two results are different

I need to know the size of a folder and some of its sub folders. So I'm trying to use the du command. I cd into the right directory and then try (in bash) : [xxx@yyy TEST]$ du -sh . 4.1G . ...
2
votes
1answer
50 views

Bind a key to newline in Bash, without submitting command

I want to press M-j and have readline place my cursor on the next line without entering a command. Thus I should be able to go back a character onto the prev. line. This answer states that it cannot ...
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votes
1answer
35 views

bash script doesn't work unless bad command given

I have a script that doesn't work (it freezes my status line) until it is completely done. However, by adding a random bad command, e.g. asdfasdf anywhere in the file that the script reaches (i.e. ...
0
votes
2answers
20 views

list file and using awk to get comment

I want to get the all comment of all files in a folder. And what I have tried is ls -R | awk '/<!--/,/-->/' >> result But it shows nothing in the result file. But if I use the awk ...
0
votes
1answer
26 views

How to create a command shortcut in BASH or ZSHRC shells?

I know how to create an alias or a PATH however those are both used to navigate folders. How would you create a shortcut to say quickly type the following commands every time? alog = tail -f ...
0
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2answers
33 views

Bash command for replacing all non-printable characters?

I have a bash script that checks database for changes and emails me these changes. Works nice, until it tries to send something non-printable, which 'breaks' the mail. Is there any handy way how to ...
0
votes
1answer
41 views

How to move unopen files to another folder

I´m beginner in Linux and I want to build a script in bash to check which files are open in a folder and move any other files - those that are not open to another folder.
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0answers
36 views

SSH remote chroot without root

I have a dual boot system consisting of two Debian OSes. I've installed one of them in a root of the partition and installed the other Debian using debootstrap; the installation partition is called ...
0
votes
1answer
51 views

Start PuTTy session in remote host over network

I have 5 hosts - A, B, C, D and E. A and B are windows hosts. C, D and E are Linux machines running ssh server on port 22. I've copied plink.exe (putty command line backend client) in host B. When I ...
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0answers
12 views

openssl print numeric value of the key?

Given a file contains the public key, I need to get the numeric value of the modulus and the e. But I can only get something like this: $ openssl rsa -in key -pubin -text Modulus (2050 bit): ...
2
votes
1answer
52 views

Probing a port for RDP

I use an ssh tunnel to RDP into my home computer ("home"). Occasionally, the tunneling software running on home crashes and the RDP port stops getting tunneled. I've attempted to resolve this by ...
0
votes
1answer
19 views

readline - deleting word under cursor

E.g. Alt-d deletes word until next word boundary. There's also a shortcut to delete until previous word boundary IIRC, but I'd like to delete word UNDER cursor (i.e. to current word left boundary and ...
0
votes
1answer
32 views

Get the Group name which has GID=0

I wanted to write a shell script in which it needs to give the group name whose GID=0.I used awk command like this, awk -F ':' {$3==0} /etc/group | cut -d ':' -f1 It works fine in redhat,aix.But ...
0
votes
3answers
40 views

Is there an automatic way to add group read permissions to “nohup.out” when “nohup” is run?

I run my Java code from bash script using a command like this: exec nohup "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" com.myClass "$@" & Which creates the output file nohup.out and this ...
0
votes
2answers
72 views

bash shell error: “no such file or directory”

I am trying to install Virtualenv wrapper on Ubuntu 14.04. But whenever I start a terminal, I get the error saying bash: /usr/share/virtualenvwrapper/virtualenvwrapper_lazy.sh: No such file or ...
7
votes
8answers
675 views

Remove linux file named with set of shell responsive characters

I've created a file named \;:$"\' to test a software of mine. I ended up with an error, because I cannot delete the file property. I'm trying to find a precise character combination to remove it via ...
1
vote
3answers
48 views

Looping until background process is done (with `jobs`) doesn't work in script

I'm trying to loop until a background process (launched earlier in the script) is complete. An easily reproducible test case is: ping -c 10 localhost &>/dev/null & On the command line, I ...
0
votes
1answer
64 views

No such file or directory when executing an existing file

I have norrowed the error down to this from a larger script and I'm getting the error "No such file or directory" when I try to execute a file which exist and I have the correct permissions for. ...
0
votes
2answers
30 views

Append text to lines between two patterns every time they appear in a file

This will be a rather hard one, i guess. I have to fiddle around with inline documentation that is extracted into html files to be used as online documentation, but these parts of the files should be ...
0
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0answers
183 views

Unable to get vmware shared folders working in Ubuntu 14.10 Guest

i Installed Ubuntu 14.10 64Bit in VMWare Workstation 10.0.5 within windows 8.1 Enterprise. I installed vmware tools by running the vmware-install.pl script in terminal.But I am Getting an error ...
0
votes
1answer
26 views

Linux Bash: Moving/Copying files/directories by timestamp

This is the command I am using: find absolute-path -name "*" -amin -120 -exec cp -f absolute-destination {} \; I’m trying to copy a lot of directories from a directory to another directory, but ...
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votes
2answers
44 views

Apply command to every line in bash terminal

I've accidentally discovered the lolcat package today. The first thing that I though about is: it would be fantastic if i could pipe everything that comes from stdout to the terminal through lolcat ...
0
votes
1answer
110 views

Remote SSH Commands - bash bind warning: line editing not enabled

I am using bash 4.3.11(1) and have the following history plugin installed (via .bash_it): # enter a few characters and press UpArrow/DownArrow # to search backwards/forwards through the history bind ...
2
votes
1answer
136 views

What is the scope of “exported” in Unix shell variables?

I have set some environment variables in the following way: MY_VAR='helloworld' export MY_VAR Then I have switched to another user via su SOME_OTHER_USER I echo the MY_VAR variable.. and I see ...