Questions about bash only, as opposed to other Bourne/POSIX shells. For all Bourne/POSIX-style shells, use the /shell tag instead.

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0
votes
2answers
22 views

Log file processing [on hold]

I have a log file like this; I can get NOW=HOUR=date +'%H' I can get login time in hour with something like cat file | awk '{print $2}' | cut -d: -f1 Is there a way I can compare the login times ...
1
vote
3answers
102 views

grep command not working in conditional statement

I've a bash script that's supposed to go over all the filenames and print them only those that contain a certain letter (let's say it's 'o'). What I've done: command=`ls -l` for file in $command do ...
0
votes
1answer
19 views

cant run dd command on android device

The main objective is to send a splited file to an android and join it back up with a .sh script, the file is splited to 5MB parts but its total size is unknown (trying to make an universal script), ...
4
votes
3answers
118 views

Easiest way to find missing quote in a bash a script?

I have a bash script which is currently 700+ lines long. After a particularly long round of editing, it now errors like so: ./run_me.sh: line 693: unexpected EOF while looking for matching `'' ...
4
votes
1answer
54 views

How does Bash auto completion work?

I can understand that bash auto completion works for standard utilities. But how does it do auto completion for custom programs like Oracle SQL loader? In the following command if you Tab after ...
4
votes
4answers
122 views

Move files by date into different directory using CLI

I have a large number of pictures from an old hard drive that I'm trying to organize. If I run ls -l, I notice all of these files have a creation date of 2012 or before. Ideally, I'd like to move ...
0
votes
0answers
15 views

What are potential problems for installation scripts modifying .bashrc [on hold]

Some software packages advices you to make an alias for a certain program,... in other words modifying the ~/.bashrc, ~/.profile files. Little of these packages have an installation script that make ...
0
votes
3answers
69 views

Concat 1000 files within a directory [on hold]

I know we can concat files by cat file [file] [[file] ...] > joined-file. I have directory which contains lots of files. I want to concat all of them. I want to concat 1000 files irrespective of ...
2
votes
4answers
73 views

Extract two values from the output of a command

I'm using the following command in a script to get synthetic wifi info: echo "$( iw dev wlp1s0 link | grep '^\s*SSID:\s' | sed -r 's/^\s*SSID:\s//' ) $( iw dev wlp1s0 link | grep ...
2
votes
3answers
44 views

How can I prepend and append to each member of an array?

I have an array: CATEGORIES=(one two three four) I can prepend to each array member using parameter expansion: echo ${CATEGORIES[@]/#/foo } I can append to each array member the same way: echo ...
0
votes
1answer
34 views

Test variable in a bash case statement

What I want is simply to do something if the first variable of the script is empty, in a case statement. Unfortunately I spent yet a certain amount of time searching for the solution but didn't find ...
0
votes
2answers
24 views

Timeout function return value

I'm using the timeout function on debian to wait 5 seconds for my script. Works great but the problem I have is that I need a return value. Like 1 for timeout and 0 for no timeout How am I going to ...
3
votes
0answers
37 views

Bash Script — ffmpeg not being invoked as expected

I'm working on a bash script to convert my music library to ogg* but executing the right command is somehow eluding me. This is the line that should accomplish it: ffmpeg -i "${file}" -f flac pipe:1 ...
0
votes
0answers
16 views

Why “killproc” command is unable to terminate a script(whiled loop with inter sleep)? [on hold]

How to terminate a whiled loop script using "killproc" without using script's pid?
0
votes
3answers
48 views

bash: Assigning the first line of a variable to a variable

I have a multiline variable, and I only want the first line in that variable. The following script demonstrates the issue: #!/bin/bash STRINGTEST="Onlygetthefirstline butnotthesecond orthethird" ...
0
votes
0answers
18 views

How can I copy the previous argument for the *current* command? [duplicate]

I can use Alt+. or !$ to get the last argument passed to the previous command, however, is it possible to get the last argument passed to the current command? For example, something that I do ...
0
votes
1answer
19 views

Help killing off Process for Mem Leak

I am currently building an Android LP kernel, and have some pretty sweet tweaks already running and built into it. I know there are numerous LP memory leaks (i've already got the bootanimation one ...
0
votes
1answer
38 views

SSH: remote variable

I want to run a complex script via ssh #!/bin/sh ARRAY1=( server1s server123 server12 server14 server13 ) for i in ${ARRAY1[@]};do ssh $i " case \$HOSTNAME in server1.domain.com) echo try1 ...
-1
votes
1answer
31 views

Webpage content - search for pattern & save to file

I have a web page, say https://test.salesforce.com. I would like to search for a pattern, e.g. "src" at the beginning of a line in the entire webpage content. If the pattern is found, I need to ...
1
vote
1answer
13 views

getting case insensitive completions with compgen in bash

I'm trying to get my command (devmode2) auto-completing with bash working with compgen -W, my bashrc has: _devmode2() { COMPREPLY=() local sonames=$(devmode2 --auto --current "${COMP_CWORD}" ...
0
votes
2answers
56 views

export PATH permanently [duplicate]

I have exported the PATH but once I switch to a different terminal or reboot Debian, $PATH is reset. Here are the steps I take: ~$ vim scripts.sh #!/bin/bash echo "Hello" I save it as mybash.sh ...
0
votes
2answers
30 views

Generate a list of installed PHP extensions

My goal is to write an as simple as possible (but not more simple) that generates a list of currently installed PHP extensions (*.so files) that the user can simply copy/paste into their php.ini. It ...
0
votes
2answers
23 views

Get or filter duplicated lines by column

I have a file with three columns and I would like to get duplicated lines by third column, for example: AAA = 342 BLABLABLA = 2 BBBx2 = 23 1+1 = 2 KOKOKO= 5 2x1 = 2 The output sould ...
0
votes
0answers
15 views

bash show-all-if-ambiguous turns on spontaneously

I am using tmux and bash. I find that, at seemingly random intervals, my running shells have show-all-if-ambiguous set to on. This is a significant annoyance to me, since many of my operations are in ...
2
votes
1answer
42 views

How do I properly escape this long su + sed command?

#!/bin/bash wineuser=tom su $wineuser -c "sed -i '$ialias ptgui "wine ~/.wine/drive_c/Program\ Files/PTGui/PTGui.exe\"' /usr/people/$wineuser/config/cshrc.csh" The acutal line inserted to tom's ...
1
vote
0answers
37 views

Shell Script to change user shell

I am writing a script that would be invoked to change user shell. The basic requirement is that once user gets authenticated (e.g: thorough some web application) the script would be invoked to set the ...
7
votes
3answers
257 views

Does while spawn a subshell in bash? [duplicate]

Can someone explain why this script doesn't produce the output I was expecting? #!/bin/bash # var=0 ls -1 /tmp| while read file do echo $file var=1 done echo "var is $var" I get a ...
2
votes
3answers
53 views

Bash | port killing loop fails

I am trying to create a bash function which should kill all processes using some ports specified in port_array. The kill-port function works if I call it myself with a port e.g. with kill-port "80";. ...
1
vote
0answers
26 views

Inherit IO redirections from a script to another

When I redirect the output of a script within a script, I expect the redirection to be applied to the called script as well as the program called within it. A: ./B 2>> error.log B: ...
2
votes
3answers
144 views

Add extension for multiple files, based on their types

I know that there are many questions about adding extension to a multiple files. But none of them could get my job done. I have a huge list of images without extension, most of them are png, but ...
3
votes
4answers
90 views

Run multiple commands and kill them as one in bash

I want to run multiple commands (processes) on a single shell. All of them have own continuous output and don't stop. Running them in the background breaks Ctrl-C. I would like to run them as a single ...
0
votes
1answer
20 views

How do I run the query 1 by 1 and return only exit code in bash script? [closed]

I've created a below script :- query1=$(command1) query2=$(command2) query3=$(command3) if [ $? -eq 0] then echo "Success" exit 0 else echo "Failed" exit fi the problem is when I ...
0
votes
0answers
37 views

Output of wc | awk is different in shell script than from cli

When issued via command line, this returns "2": pgrep someprocess | wc | awk '{print $1}' When run in a script like this, it returns "4" #!/bin/bash SOME_PROCESS=`pgrep someprocess | wc | awk ...
1
vote
0answers
12 views

Run a query and Send out email

I created a script to monitor and have a query as below :- httpUrl="http://some.website.ashx" balExp=$(curl -v -X POST -d "UID=test&PWD=2222" $httpUrl) How do I sent email alert (my email ...
4
votes
4answers
209 views

How can I copy a file in a bash script and rename it while copying and place it in the same directory

How would I copy a file "file.doc" and rename it while copying to "file_copy.doc" and place it in the same directory ? And this only by calling the script and adding the file name in the argument: ...
-3
votes
1answer
42 views

Help to run a script command from one server on another

I have a go daddy account and also a vps in germany. In my vps, i run a code script (we will call it codegen) when i run ./codegen i get my question of how many codes do i want to make and with that ...
2
votes
1answer
43 views

Why sudo env is not showing all the environment variables?

I have a variable set in a script file in /etc/profile.d/somescript.sh I have modified the /etc/sudoers and added "ansible" user to the sudoers file like this: Defaults !env_reset ansible ...
1
vote
1answer
27 views

Bashrc PS1 error

I created a nice PS1 for bash with http://bashrcgenerator.com/, but something seems to go wrong. The terminal emulator shows me some random, characters which means that PS1 probably has a syntax ...
0
votes
0answers
36 views

use result of last line in bash [duplicate]

-> which vim /home/spo/Home/Platform/Linux/Module/Vim/Bin/vim su spo $RESULT_OF_LAST_CMD /etc/fstab What is the bash variable that holds the last commands result , like google chrome terminal . ...
3
votes
3answers
203 views

How to move subdirectories into another subdirectory within the same directory?

There is a directory dir/. It contains subdirectories a-z. I need to move subdirectories a-y into subdirectory z. If that's hard, then not a-z, but by providing a list of directories that need to be ...
6
votes
4answers
256 views

All possible combinations of characters and numbers

So I want to do generate all possible combinations of lower and upper case characters and numbers that can make up a 5 character string. Possibilities: a..z, A..Z and 0..9. Is there any elegant way ...
1
vote
1answer
15 views

Store command output from openssl?

Im writing a script where I'm trying to verify certificate passwords. This is what I had in mind. passtest=$(openssl pkcs12 -info -in $CERTPATH -passin pass:$certpass) if [[ $passtest == *"invalid ...
0
votes
1answer
36 views

How to pass variable into parallel script from text file line by line

I need to read a file line by line and pass the string as a variable for a script to be run in parallel. ex: 14 43 57 is in foo.txt if I var=$(cat foo.txt) then I can use this $var for inside a ...
1
vote
1answer
30 views

read reading input devided by spaces

How can I read in POSIX bash input like this: <name>,<tag1> <tag2> <tag3>… I tried while read line;do done but this wants newlines, all I have is spaces. (Is IFS solution? ...
1
vote
1answer
46 views

A question about shell and .profile,.bash_profile,.bashrc

I'm on aix 7.1,my shell is bash if i did ssh ibmunix gqlplus user/pass All works and gqlplus start,gqlplus is on /opt/freeware/bin If i did from another machine ssh ibmunix "gqlplus ...
7
votes
1answer
131 views

Why there isn't a new line at the end of quoting a subshell and passing the results to echo?

When I do ls | grep png the output of grep is: 2015-05-15-200203_1920x1080_scrot.png 2015-05-16-025536_1920x1080_scrot.png (filename,newline,filename,newline) then, echo $(ls | grep png) outputs: ...
0
votes
0answers
31 views

Shell Scripting - return to previous loop until process is completed then die/done

I am writing a bash/shell script to automate some file filtering functions. I am stuck due to being new to scripting and I am not sure how to code the function in it to keep looping the top section of ...
-2
votes
0answers
45 views

Convert perl to shell/bash [closed]

I understand C and C++ and new to perl scripting. I must convert the perl script under the following url to shell or bash: busware Here is the code: #!/usr/bin/perl use warnings; use strict; use ...
2
votes
4answers
90 views

Why . /home/Desktop is incorrect and ./Desktop is correct?

I'm learning about Linux, started yesterday. I have a question which I couldn't answer from my book or Google. What is the difference between ./ and / in the shell? I'm asking this because when I ...
-1
votes
1answer
29 views

Add git information to a bash prompt with colors

I set my PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ ' I followed this link, to setup my git. And I lost the color of my prompt. If I remove the variable, the color comes back. I am using Xubuntu, 15.04, ...