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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1
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1answer
44 views

I want to create a cron job that runs a command on a remote linux box using ssh but I want ssh to answer password [duplicate]

Thank you for the reply.This is not what I am after. The ssh from server 0 to (1,2,3) (no password) but a remote script on server (1,2 & 4 ) which starts a service/application needs a password for ...
10
votes
4answers
14k views

Passing named arguments to shell scripts

Is there any easy way to pass (receive) named parameters to a shell script? For example, my_script -p_out '/some/path' -arg_1 '5' And inside my_script.sh receive them as: # I believe this ...
0
votes
0answers
34 views

LFTP mirror includes - including other directories other than what i've included

My question: How can I make sure LFTP only includes files AND directories using --include or --include-glob, and not download a bunch of extra directories from the root of the remote that aren't in ...
2
votes
2answers
56 views

Bash Scripting VIM commands

I have a few files that I have an annoyingly repetitive group of VIM commands to apply to. They are basic VIM commands just to delete some lines which are not supported by the process I need the files ...
1
vote
1answer
47 views

Strip newline from piped input

I've been setting up a script to work with haste-server. This takes piped or file input (tail /var/log/messages | haste and haste < /path/to/file.txt) and submits it to the server which then ...
5
votes
2answers
5k views

Trouble in script with spaces in filename

I've got a script that scp's a file from remote host back to local. Sometimes the file names contain spaces. scp does not like spaces in its file names. For some reason my attempts at handling the ...
11
votes
4answers
529 views

What is the meaning of IFS=$'\n' in bash scripting ?

at the beginning of a shell script program in the bash is the following line: IFS=$'\n' What is the meaning behind this collection of symbols ?
1
vote
3answers
118 views

BashScript works from Terminal but not from CronTab

I've got a bunch of CronJobs, and they work fine, except for one. I've looked through a lot of forums and websites, and tried a combination of things but alas nothing has worked. Rephrasing the ...
11
votes
5answers
7k views

In bash, how can I convert a Unicode Codepoint [0-9A-F] into a printable character?

I have a list of Unicode codepoints, but I don't know of a "simple" way to convert these hex values into the actual characters they represent... I've heard that zsh has echo -e '\u0965', but I use ...
0
votes
2answers
33 views

Two coupled substitutions in single command line?

This works great: ls /path/{foo,bar}/ Now, what if I want to effectively do: cp /path/foo/bunch/of/stuff/foo.txt /path/bar/bunch/of/stuff/bar.txt Is there some short-hand I can do on a single ...
1
vote
3answers
49 views

Replace bunch of files maintaining path

I have directory A and B. Each of them contains another directory with item.json inside. Only item.json file is persistent in directories so I cant copy-paste the directories. A: ./path/Item ...
0
votes
0answers
14 views

Why Git Bash always suggests me a `debug` autocompletion?

I'm using Git Bash on Windows Whenever I type sth like deb in console and press TAB to have autocompletion, I get a debug suggestion. But I don't understand why it's the case. I don't have any such ...
10
votes
1answer
442 views

How to output string completions to stdout?

Some of the git commands have many options, and it would often be useful to search through them for the one I need - I was just looking for the option which controls the TAB width in git-gui, but ...
2
votes
2answers
75 views

Using find to list all files under certain directory

I'm trying to use a single line command that will find every directory (or sub-directory) named bin and will then print a list of all the files under it, but will not also list the directory names ...
2
votes
1answer
76 views

Set bash script output to the line that called bash script

I've looked for the greater part of two hours trying to see if I could find a way to redirect the output of a bash script to the line that called the bash script. The best example I can use to ...
0
votes
1answer
2k views

Proper escaping of double quotations for curl post data?

I'm trying to test out a server, by sending it JSON data and reading the response. I need to POST data like {"item":"value with spaces"} but when I use curl I find that it sends the backslashes as ...
2
votes
2answers
71 views

remove the low version number of file

I have these files: atk-2.8.0-ia64-11.31.depot gtk+2-2.24.25-ia64-11.31.depot lzo-2.09-ia64-11.31.depot bash-4.3.030-ia64-11.31.depot gtk+3-3.6.5-ia64-11.31.depot ...
8
votes
4answers
397 views

How can measure how long it takes my script to run AND include that in an email it generates?

I have a simple bash script that runs a series of checks (ping, nslookup, etc) and then sends an email report with the output of that data. I'd like the email to include information on how long it ...
1
vote
1answer
35 views

use bash to pass 2 variables to a Makefile

I have a bash script which outputs calls to my make file. #!/bin/bash mylist=( 'SAMPLES_OUT=$(call list_samples,AON_9,NT_1,SC_17) ...
1
vote
1answer
44 views

My terminal is pure white // removal of the things spf13 has done to my Ubuntu

I have installed spf13 by using the command: curl http://j.mp/spf13-vim3 -L -o - | sh I didn't liked what I got, so I tried to get rid of it. I managed to get to my previous VIM configuration, but ...
22
votes
7answers
35k views

How do I can get the size of a file in a bash script?

How do I can get the size of a file in a bash script? How do I assign this to a bash variable so I can use it later?
0
votes
2answers
1k views

“Expect” automation tool output to shell variable

#!/bin/bash # more commands here expect << EOD spawn telnet localhost 9151 expect -exact "Trying 127.0.0.1...\r Connected to localhost.\r Escape character is '^]'.\r" send -- "AUTHENTICATE ...
2
votes
1answer
48 views

how can I add an extra character after a word search [closed]

I have the following field names demelog voyapro naisjdf naismc decoide decoccm travide travccm equiccm mariccm Below is a sample of my file. There are more columns before the first fck=83... ...
4
votes
3answers
381 views

Why is this command not working: “ps aux | grep xscreensaver”

I didn't see any hits about this on google, so I'm asking you: I just tried to run this command in an ssh session, local is Debian Wheezy KDE, remote is Fedora 21 Gnome: ps aux | grep xscreensaver ...
1
vote
1answer
102 views

grep (/sed/awk) month range

I've looked around for solutions to this, but it's sort of difficult to search for the solution to such a specific problem (lot of words to put in Google). So, I have a file with data that looks like ...
2
votes
2answers
24 views

Modify background jobs and/or notify on job completion post-launch [duplicate]

I would like to be able to somehow modify a running command and/or get notified when a running command completes after it has been started. Normally, when I know a command is going to take a long ...
4
votes
2answers
73 views

How to make program help text automatically pipe through less?

Just now, dpkg --help spit out three pages of output in my face. I was maybe interested in the first ten lines, which show the general usage and most common arguments. I'd like that, whenever I run ...
1
vote
1answer
38 views

Script not running correctly on startup

I have a very simple script that echoes some stuff then starts a VNC Server. It works fine when I run it on the command line but when it runs on startup it gives some strange results. Here is my ...
-1
votes
1answer
36 views

Alias to create and cd into directory [duplicate]

How can I create a reliable alias or function that let me create and cd into one directory? I tried the following, but, as an example can't create directories with spaces. mcd () { mkdir $1 ...
2
votes
3answers
64 views

How to insert bash variables in awk?

How to insert bash variables in awk (for example i need to do in in some for loop - like this: in first iteration use awk to search string by first column, next by second column and so on with using ...
6
votes
1answer
63 views

stat: print time in “long-iso” format

For my script, I would like to have stat command to print time in a nice, human friendly, way: 2015-02-04 00:48:31. ls calls this format long-iso and it can be used like this: $ ls -lA ...
1
vote
1answer
61 views

script needs to add another loop

script which runs netstat -tulpun | grep -i port_from_the_list & takes the output for running the next command I need to run 2 command on all the server mentioned in the list. server: Jan port: ...
0
votes
2answers
87 views

arch linux systemd RTC clock script does not execute

I have rtc.service service in /etc/systemd/system: [Unit] Description=RTC Service [Install] WantedBy=multi-user.target [Service] Type=oneshot RemainAfterExit=yes ExecStart=/scripts/script_rtc.sh ...
2
votes
2answers
55 views

suppress stderr messages in a bash script

Consider the following (slightly silly) script name 'test1.sh': #/bin/bash # sleep 10 & echo sleep pid = $! pkill sleep When I run it, I get not only the output of the echo, but bash's ...
0
votes
1answer
42 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: ...
0
votes
2answers
74 views

Convert input string to date in shell script

My shell script: #!/bin/bash echo "$1"; startd=$(date -d "$1" +"%Y%m%d"); echo "$startd"; My command: sudo ./test.sh "20151010" The output: 20151010 20150213 it printed todays date ...
3
votes
1answer
46 views

How do you get the first file in each subdirectory matching a list of file extensions?

How do you get the first file in each subdirectory matching a list of file extensions? My goal is to run a program on just any one of the files in a series of subdirectories. For example, below ...
0
votes
1answer
47 views

auto restart apache when high load average

My server always shut down when it reach a high load average. I have optimized my apache, mysql. but i cannot prevent sometime in a heavy traffic. So I try to write some shell to control load average. ...
1
vote
1answer
18 views

Comparing variables in arithmetic

Was wondering if someone can take the time to explain the following: I have a directory of files (PDF), which I place into an array. shopt -s nullglob # Set array ...
1
vote
1answer
56 views

How can subtract 2 floats which have been extracted from 2 other files with BASH [duplicate]

I'm trying to get the difference between two numbers which I have taken from two files. I think my code will make sense: I've tried to make it work by two different methods, didn't work. What I get ...
3
votes
2answers
66 views

Execute command after inotifywait established watches

Inside shell script (test.sh) I have inotifywait monitoring recursively some direcotry - "somedir": #!/bin/sh inotifywait -r -m -e close_write "somedir" | while read f; do echo "$f hi"; done When I ...
-1
votes
1answer
37 views

killall fails some time

Hi below is the script which is intended to kill all instances of the process "processName" but sometimes it is not able to kill the process and we see double instance of the same process how can I ...
2
votes
1answer
3k views

Screen in bash script

I am using a bash script and I need to create a screen, execute a specific command with a memory limit and detach the screen. I have been trying something similar: #!/bin/bash for i in 1 2 3 4 5 6 7 ...
0
votes
3answers
28 views

Error when trying to accept a directory path as a command line argument

I'm trying to accept a directory path as a command line argument in order to check recently changed files - not too sure if I'm doing it correctly: script=$scriptpath find . "$scriptpath" / -user ...
0
votes
3answers
41 views

call command with absolute path using bash variable

I'm using android sdk and I need to use the android command in my script, the file I need is in the following folder: /my_downloads/android-sdk/tools/android. I tried to do this in my bash script: ...
2
votes
1answer
65 views

How to print last login time?

I'd like to know how to set in .bashrc file to print the last login time of users when logging into another user in terminal. I do know that with who or last, but I'd like something a little more ...
2
votes
1answer
33 views

Rotate image if width is greater than a value (i.e in pixels)

I was trying to rotate few hundred images which have 7000px height in 1000+ images how to rotate them from bash.
7
votes
2answers
11k views

In a bash shell script, writing a for loop that iterates over string values

In bash, I know that it is possible to write a for loop in which some loop control variable i iterates over specified integers. For example, I can write a bash shell script that prints the integers ...
3
votes
4answers
3k views

How to capture error message from executed command?

I was tasked to create an automated server hardening script and one thing that they need is a report of all the output of each command executed. I want to store the error message inside a string and ...
1
vote
1answer
78 views

bash script problem when run from desktop launcher

I have a script which does the following: Connect via sshfs to a directory on a server Within that directory, there is an encrypted volume. Open it to the device mapper. Mount to a local directory ...