Strings are typically delimited by quotes, which raises the problem of dealing with strings that include quotes.

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4
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2answers
178 views

Man page quotation characters [duplicate]

I've just been looking through a few man pages for a few different commands including grep and ifconfig. I've noticed over a few pages, the content uses a strange syntax to notate what i think are ...
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 ...
0
votes
3answers
38 views

How can I add a line including single quotes to a file with sed [duplicate]

I want to append the following line to a text file with sed: gem 'forum2discourse' I've tried sed -i '$a gem \'forum2discourse\'' Gemfile but this drops me to a > prompt so I think I must be ...
6
votes
1answer
135 views

Why can't I escape the braces “]” in sed?

Question: Why can't I escape the "]"? $ printf "*#$@~\!&*()[]\n" *#~\!&*()[] $ printf "*#$@~\!&*()[]\n" | sed 's/[*#$@~!&*()\[\]]//g' *#~\!&*() $
1
vote
4answers
214 views

Wildcards for filepaths aren't working in grep [duplicate]

I need to grep words like these: ABC-DEF AB2-DEF AB3-DEF AB-DEF So I was trying: grep AB*-DEF grep -w -AB*-DEF grep -w AB*DEF But neither of them are working. Please help.
2
votes
1answer
28 views

Can not access my external hard drive.

I am fairly new to Linux and have been trying to move some files around with terminal on my external hard drive but I can't seem to get it to work. I am using a generic external hard drive with a ext4 ...
5
votes
2answers
130 views

scp command behaves differently when used with expect utility

expect -c 'spawn scp -C -o CompressionLevel=9 ~/partFiles/* abc@10.200.4.15:/export/home/abc/; sleep 10; expect password; send "secretPassword\n";interact' throws - ~/partFiles/*: No such file or ...
1
vote
1answer
57 views

Using sed to replace a string with special chars with another string with special characters

I'm trying to automate switching out a bash prompt for another in .bashrc Original String: PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' ...
0
votes
1answer
26 views

Syntax Error while running command from another hosts [duplicate]

I run a command to fetch server uptime as below [root@localhosts ~]# printf "`uname -n` `uptime| awk -F " " {'print $3,$4'}`\n" localhosts 75 days, Now when I run same command from another ...
3
votes
5answers
75 views

`xargs` with spaces in filenames

I'm trying to list only non-image files, searching only in the most recent 500 files. So I run ls -t | head -500 | file | grep -v 'image' which isn't right: it displays a help message. Changing it ...
2
votes
2answers
37 views

Git alias multi-commands with ; and &&

I want to have an alias that execute a command and then whether it fails or no it execute other commands that depends on the success of each other. So I have something like that in .gitconfig ...
0
votes
2answers
35 views

Exclude the output from ssh and only log the error if found

typeset -f | sshpass -e ssh -o StrictHostKeyChecking=no user@${IPADDRESS} " $(cat); IFERROR=$(checkscript); echo "$IFERROR"" > ${SSHTEMPFILE} 2>&1 This line...I can't exclude the ...
2
votes
1answer
23 views

Quoting: loop over ssh-accounts, call psql on remote server

This works in the human brain, but the shell misses quoting: for h in a b; do ssh $h psql -tAc "select * from mytab where mycol='x'"; done How to quote this one liner without loosing readability?
2
votes
1answer
52 views

Bash - Command substitution adds single quotes

I have a problem with bash behavior while evaluating grave accents. I want to run find with optional -name: find -name "*.log" works fine, but when i want to get the -name part from nested script ...
1
vote
2answers
34 views

Problem with using expr

I've got two strings str1="( 1 + 2 + 3 + 4 + 5 ) / 3 + 5" and str2="( 1 + 2 + 3 + 4 + 5 ) / 3 + 5 * 2" The command result=` expr $str1` returns a correct value, while result=` expr $str2` ...
0
votes
1answer
81 views

grep: Syntax error near unexpected token `('

I have this problem: I'm looking for a string inside file . Syntax is: grep -E ‘( ^ | [[:space:]] )[A-Z]{2}[[:digit:]]{2}((- | [[:space:]] )[[:alnum:]]{4}) {3} ’ (filename) When I run this ...
0
votes
2answers
89 views

Recursively remove files with idx > 10,000

The problem In the current working directory I have several (very many) folders and some of them have lots (like 100,000+) of files inside. My goal is getting just the folder with 10,000+ files and ...
1
vote
2answers
68 views

sed - doesn't append new line EOF and replaces letter not defined

I am experiencing a strange behavior using a sed command (got to be sed, no awk in this case) and got two questions for you, hoping someone got the skills to explain me what I am doing wrong. I want ...
1
vote
2answers
56 views

Splitting the working directory in a bash script

If a do: IFS="/" read -ra PARTS And type in a path manually, it creates the array "PARTS" as hoped, however: IFS="/" read -ra PARTS <<< $(pwd) creates an array with a single element, ...
4
votes
2answers
391 views

while: command not found

I'm trying to do this as an April Fool's prank: make a linux machine display a message in the shell every few seconds. My thought is to achieve this by starting an infinite loop that runs as a ...
1
vote
4answers
110 views

find: missing argument to `-exec'

when I'm trying to use this command var1=`sudo -u psoadmin -H -s ssh daill_scp@files.dc1.responsys.net find . -maxdepth 1 -type f -mtime +14 -exec ls -lh \{} \; | awk '{print $5, $9}'|egrep -v ...
3
votes
2answers
57 views

GNU Parallel: Event not found (!~)

About my code: get all .txt files for each file, execute the awk command. All files are processed in parallel if colum 3 does NOT contain "needle", write line to file Result: -bash: !~: event ...
-1
votes
2answers
28 views

Create new file with spaces from argument BASH [duplicate]

I need to create new file which contains spaces in it. And it is passed through the argument. This code below creates 2 sepate files. Can anyone help me how to create 1 file which will contains space? ...
2
votes
3answers
50 views

Command substitutions vs backslash escapes in a quoted string

Consider a double-quoted command substitution with backslash escapes inside it, like this: echo "$(echo '\\')" It prints out \\, whereas I would have expected it to print out only one backslash. My ...
-1
votes
1answer
38 views

Mutiple commands after sudo in one line

I want to execute multiple commands after a sudo command su - appuser -c "cd /apps/bundle/bundle-client/bin ; export BDL_WEB_USER=not_used ; export BDL_WEB_PASSWORD=not_used ; ./bundle -b ...
0
votes
1answer
85 views

Double quotes in bash

I am trying to create a bash file which calls a program that expects a parameter to submitted between two double quotes. Take a look at my file content. #!/bin/bash echo ./yowsup/yowsup-cli demos ...
2
votes
4answers
174 views

How do I perform xargs grep on grep output that has spaces?

I'm searching for files based on a regular expression, and then I'm trying to search those files for content. So, for example, I have something like #Find all C++ files that match a certain pattern ...
1
vote
1answer
66 views

awk pattern with variable in a bash script

I have problem with command awk in bash I want to find pattern with variable, but it doesn't work. Can you tell me what's wrong with this line? awk -F" " "/$PWD/ {print $1,$3}" file.txt
1
vote
1answer
45 views

BASH: looping through ls [duplicate]

I'm having trouble with this piece of code: 22 for filename in "$( ls "$1" | grep ".*\.flac$" )"; do 23 file_path="$1${filename}" 24 ffmpeg -i "${file_path}" -f ...
0
votes
2answers
36 views

Why is wget still failing even after enclosing the URL with double quotes?

I enclose URLs I want to wget with "" since most of them have spaces, braces, etc. It usually works fine, but I can't get this URL to work: wget "http://xxxx/Sankarea - 6 - It`s Because I... Ran ...
1
vote
2answers
102 views

sh -c: Unterminated quoted string error [duplicate]

I've spent hours trying to understand the following error. My Script CMD="sh -c 'echo \"a\"'" $CMD Error: "a"': 1: "a"': Syntax error: Unterminated quoted string of course when I do echo $CMD ...
1
vote
2answers
278 views

How to put $@ in quotes?

My bash script looks like this: #!/bin/bash grep -r --color=always $@ . | nolong The file is saved in /usr/bin/findstr Everything's ok when I run this: findstr hello But when I run this: ...
4
votes
2answers
121 views

Replace string in a file with another where both are saved in variables

I want to replace a string found in a file with another string, but both have a special character (in this example it is a . char) e.g 1.0 and 2.0. So this is the command currently used: sed -i ...
1
vote
1answer
39 views

Replace a string in a text file using a shell script not working properly

I have a text file containing this: 0 0 -1 0 1 0 0 0 0 -1 0 0 1.5 0.0 1.0 1 and I want to replace the 1.0 to 2.0 so that it becomes: 0 0 -1 0 1 0 0 0 0 -1 0 0 1.5 0.0 2.0 1 so I use this ...
0
votes
2answers
110 views

ssh inside a script with 'command' instead of “command”

I am trying to run commands on various nodes of our cluster automatically via a simples script. I have seen that I can run: #!/bin/bash echo "Machine: "$HOSTNAME; ssh machine2 'echo Machine: ...
1
vote
4answers
54 views

echo \\* - bash backslash escape behavior, is it evaluated backwards?

So in bash, When I do echo \* * This seems right, as * is escaped and taken literally. But I can't understand that, when I do echo \\* \* I thought the first backslash escaped the second one ...
1
vote
1answer
54 views

How to pass a path to a file through a call to perl from bash?

This is a more advanced version of a previous question (How to pass arguments to perl when trying to change a line?) I made. This time I am trying to pass a path, but evertything seems that the the ...
1
vote
1answer
77 views

Create tar files from shell script with current time stamp

I am trying to create a shell script which will back up my git codebase and save in a specific back up directory with current days name So far I have : #!/bin/bash branch="master" if [ $# -eq 1 ] ...
1
vote
2answers
59 views

Single or Double quotes when defining an alias?

I know that contents of double quotes are expanded, whereas the contents of single quotes are not, such that echo '$1' gives $1 where as echo "$1" gives <the argument - blank in this ...
0
votes
1answer
242 views

Replacing white-space / characters with backslashes [duplicate]

I want to convert a bunch of mkvs to mp4s with the following command: for i in $(ls *mkv); do ffmpeg -i $i -vcodec copy -acodec copy $i.mp4; done; However, the filenames have whitespaces and ...
1
vote
2answers
76 views

Any special permission ssh remote command working on fifo file(aka named pipe)?

I need to redirect some strings to a fifo file with ssh remote command, but always got permission denied, the command I executed is: ssh rundeck@nagios1 sudo su - root -c 'printf ...
2
votes
2answers
41 views

Why is a variable passed to the su command, but not an array from the same scope?

In the example below, why does $var get passed to the su in the start function, but not the array modules ? #!/bin/bash var=cat modules=( one two three four ) start() { su gleventh -c "for i in ...
0
votes
2answers
33 views

How to search parenthesis by ack

I want to search for a parentheis ( using ack, but neither using ( nor \( worked. The first one ("(") is recognized as a multiple line command. The second one ("\(") is treated as an invalid regular ...
1
vote
1answer
49 views

ksh “<<EOF” script to change user

In the simplest form I am puzzled why this script does not work as expected as a here script changing users with su - user <<EOF. su - db2prd<<EOF PARMDATE=1111111 echo parmdate echo ...
1
vote
1answer
58 views

how to locate a name-not-specified file in bash? [closed]

I have a bash like this to easily upload a file to my server: FILE=../"$1"/1.txt scp 1.txt remoteserver #upload the file to a remote server. The $1 is for input directory and I have a lot of ...
4
votes
2answers
294 views

How to echo `single quote` when using single quote to wrap special characters in shell?

I'm reading shell tutorial today from http://www.tutorialspoint.com/unix/unix-quoting-mechanisms.htm In which it mentions: If a single quote appears within a string to be output, you should not ...
1
vote
3answers
53 views

how to express line feed in shell?

Im my debian7.8 bash shell. str="deb http://ftp.cn.debian.org/debian/ wheezy main contrib non-free \n deb-src http://ftp.cn.debian.org/debian/ wheezy main contrib non-free " echo $str > ...
2
votes
1answer
112 views

Bash - Split quoted parameters

I have a script which gets called with two parameters: ./script.sh a b I'm currently reading them through $1 and $2 (such as cd $1). My problem is that the output needs to be the same for when the ...
0
votes
1answer
97 views

pass quoted string argument in sh script

I simply don't understand command-line (works): $ someprog -flag 'key1=val 1,key2=val 2,key3=val 3' sh direct (works): #!/bin/sh someprog -flag 'key1=val 1,key2=val 2,key3=val 3' sh variable ...
0
votes
1answer
66 views

Make does not work when invoked from a bash script

So i just asked a question : for loop over a list This works perfectly now and outputs what i need. Now i want to link this to a makefile which should be called per variable in my list like this: ...