A shell is terminology for a command-line interpreter most commonly used with Unix-like operating systems, but also used to interact with GUI-based operating systems in a more granular fashion. Not only does it allows the user to run programs from a text interface, but frequently offers basic ...

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2answers
220 views

Changed /bin/sh to /bin/busybox for root, broke SSH access. How to fix it?

I made a silly mistake... I was playing around with busybox and used chsh to switch the root shell from /bin/sh to /bin/busybox which seems to have broken the SSH access. When I do: root@dev:~$ ssh ...
1
vote
1answer
20 views

SFTP script gets different destination response when run from different directories

I'm baffled by an SFTP shell script and any help would be greatly appreciated. I wrote an sftp script to connect to and upload ACH information to a banking site. The script uses 'expect' to wait for ...
0
votes
0answers
50 views

why a user account with /bin/false shell in directory server is asking for membership in groups?

Firstly, we use ldap for user authentication. I have accidentally deleted a person account(his loginShell is /bin/false)from our directory server(sun DS7) running on red hat enterprise linux, although ...
0
votes
0answers
283 views

Restart ffmpeg process streaming rtmp video if it fails using shell script

We use ffmpeg to forward streams live. Often due to unknown reasons or due to the stream stopping temporarily the command stops running in the background. What's the best way to monitor and continue ...
1
vote
1answer
50 views

Running “find” and piping the output to “wc”/“sort”, inside an outer “find -exec”

I've a folder used by imapsync to store its own cache. Such a folder contains a subfolder for each of the mailbox I'm syncing, and nothing more: [dv@monitor] find * -maxdepth 0 -type d | wc -l 126 ...
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votes
0answers
28 views

Why upstart starts my processes in an inconsistent way

I'm debugging a strange issue with upstart managed jobs. I have a ruby web application which is started using passenger and I generate upstart configuration files using foreman The problematic ...
29
votes
5answers
4k views

Why does it take tens of seconds to get a shell prompt?

It's a sort of regular occurrence that, after SSHing to a server (or even opening a terminal on my Mac), the login banner prints immediately but it takes ~10 seconds to a minute for the shell prompt ...
1
vote
2answers
126 views

Shutting down host from within jail

I've created a jail with ssh using Finch-Freebsd on a NAS4FREE and added a local non super user to access the jail via ssh. I want to be able to grant this user limited shell access specifically to ...
0
votes
1answer
28 views

Cannot change default shell in solaris 8

I have a situation. We have Solaris 8 machines. For every users we have to change the shell from /bin/sh to .../sdshell. So far we have been doing it by editing the /etc/passwd file manually. Is ...
1
vote
1answer
56 views

Python script crashes when run via Cron

I have a python script that completes exactly as expected when run manually as the root user. When I put the script into cron.daily it crashes 100% of the time. The error is a timeout error, but ...
0
votes
1answer
75 views

sudo (-E) doesn't preserve path, even when configured appropriately

I have circus installed in a python virtualenv using virtualenvwrapper, and I want to run it with sudo. Sounds simple, right? Unfortunately even after reading man sudo and man sudoers, I don't ...
1
vote
2answers
71 views

How to prevent rsync from chown'ing remote users files

I'm doing rsync /local/path/to/src user1@remote:/path/to/dest. dest belongs to user2@remote. How do I keep rsync from chown'ing dest to user1 after syncing? Please note that I have already tried ...
0
votes
2answers
27 views

Move all ls output and symlink

I want to move some of my files in directory to another drive and create symlink for each of them in the old directory that will point to the new directory. For example, [root@localhost olddir]# ls ...
0
votes
2answers
150 views

How can I redirect logfile output to a network socket?

I am using a commercial Java app which writes it's logfiles using log4j. I'd like to get those logfile entries into Syslog where we have specific filters setup to trigger on system events. Log4j ...
0
votes
0answers
27 views

bash scripting and comparing 2 directories - Beginner [duplicate]

My problem is that i have to check what files are included in the $directory, then i have to make a new file with name specified by me and compare if the name doesn't already exist in this directory ( ...
0
votes
0answers
10 views

shell script for checking the list of websites status [duplicate]

How can i write a shell script for Checking the list of websites in a server which are running up or not. If they are running leave it. Those who are not running what type of error it is popping out ...
2
votes
2answers
2k views

Shell script for docker ps -a | grep to find number of certain containers running

I want to write a script that is executed by my development build server that will remove any 'similar' docker containers before building and running a new container. Below is pseudo code for the ...
1
vote
2answers
45 views

Dangers of closing file descriptors

In the Stack Overflow question Check if a program exists from a bash script the accepted answer notes that closing stderr is dangerous: (minor side-note: some will suggest 2>&- is the same ...
2
votes
3answers
72 views

Execute Shell loop in parallel, but only N workers

We have more than 100 git repos, and sometimes I want to grep over all. To update the repos I use this: for repo in *; do (cd $repo; git checkout master; git pull); done This is quite slow. How ...
1
vote
1answer
203 views

Does whitespace matter in nginx conf files?

I have an nginx conf file that due to using environment variables, I have a shell script echo, this file I refer to as nginx.conf.template, then I place the echoed result into the actual nginx.conf, ...
-6
votes
1answer
34 views

How to enable ssh access without public/private keys [closed]

I want to access my server via terminal like this: ssh username@host.com Password: (enters password) ... I have access to cpanel for this server. There is a section called "SSH access" where I can ...
0
votes
1answer
82 views

Change shell prompt based on container name?

I have been doing a lot of work using Linux containers, and I keep forgetting which of the terminals on my screen is running inside which container, particularly when I leave them open overnight. How ...
0
votes
0answers
51 views

Change ram usage in apache.conf

I´m triggering a shell command from my PHP script. As it is much slower when running from my Webserver then manually from shell, I thought the max ram per Apache Thread might be the reason. The ...
1
vote
1answer
393 views

unexpected end of file error in script file

#!/bin/sh # Host = ############### Port = #### email_id="##################" email_sub="######" # if ping -q -c 5 $Host >/dev/null then result_host="Successful" else result_host="Not ...
2
votes
2answers
80 views

Why is the cron ENV different from the user's ENV?

On a new Ubuntu install, a user's PATH is: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games But in that same user's cron environment, it is: /usr/bin:/bin ...
2
votes
1answer
96 views

Echo each shell script command with a timestamp

set -x or set -v prints every executed command. How do I get the command printed with the time when the command started executing?
0
votes
1answer
2k views

run PHP file from shell script

I have never added a cron job and am not much use with shell either... My chosen cron directory is /etc/cron.daily/ all I need my script to do is run a php file daily. I would be nice if it ran at ...
0
votes
3answers
139 views

Doing a backup with mysqldump and drop it on another server (Bash)

I'm using a cron job to do backups hourly and now, I want to drop those backups on another server by default. My script is the following: mysqldump -u db_user -p db_password db_name| gzip > ...
5
votes
1answer
336 views

Running detached screen session but without termination in the same bash

Here are already many questions like this, but every one recommends (a variant of) the following solution: screen -dmS somename bash -c "/path/to/script; bash -l" e.g. when the script ends, run an ...
2
votes
3answers
364 views

What is making /tmp/info-html*.tmp files and how do I stop it?

What is making /tmp/info-html*.tmp files and how do I stop it or configure it to clean these up and/or make these somewhere else? For example, # ll /tmp/info-html* -rw-r--r-- 1 user user 0 Oct 30 ...
0
votes
1answer
727 views

sftp: get file by mtime

Objective: Connect to sftp server with very simple script using -b option, cd to directory and get file with the latest modified time or created time. I can connect and download *.csv but that may ...
1
vote
2answers
585 views

Why can't I capture AWS EC2 CLI Output in Bash?

I am trying to capture the output of an aws ec2 delete-snapshot in a Bash script command but I cannot get anything to capture the output. I have tried result=$(command), result=`command` etc. but when ...
4
votes
2answers
964 views

How to generate gpg key without user interaction?

I found in https://www.gnupg.org/documentation/manuals/gnupg/Unattended-GPG-key-generation.html#Unattended-GPG-key-generation method to generate gpg keys without user interaction, but it doesn't seem ...
1
vote
1answer
129 views

Trouble installing ZSH

I did the following: yum install zsh Then chsh eduar New shell [/bin/bash]: /bin/zsh When I type: curl -L http://install.ohmyz.sh | sh I got this: You already have Oh My Zsh ...
0
votes
2answers
2k views

Shell Script to connect to Database and execute query [closed]

#!bin/bash Query="update table_name set colume ='i' where column_name is NOT NUll" mysql -u username -p password mysql <<EOF $query; EOF The above script is not working
2
votes
1answer
4k views

Add cronjob with bash script - No crontab for root [duplicate]

I have a deployment script and in it I'm trying to add a cron job. This is the code I am using which I found on stackoverflow. I'm running debian 8. # ADD CRON crontab -l > mycron echo "10 * * * * ...
1
vote
0answers
101 views

mail send format issue in different linux servers

I have created a send mail script which will run on couple of my client servers. The mail was sent correctly in couple of servers but in some servers the format we receive is not what what we ...
2
votes
1answer
2k views

Update version of network manager

In shell on sever I see following error after launching several commands: Error: nmcli (1.0.0) and NetworkManager (0.9.9.1) versions don't match. Force execution using --nocheck, but the results are ...
0
votes
2answers
136 views

Add a user from root with ssh key

Perhaps a strange question, but I'm not a shell script expert. I'm provisioning an Ubuntu server starting out as root. I'd like to non-interactively setup a new user account, remove root login and ...
0
votes
1answer
279 views

Nagios bash syntax error

I want to refer with this question to the following post where I got the Skript: Post with Script I'm using Bash 4.1.2(1) and when I try to execute the script, I get following error messages: ...
0
votes
1answer
84 views

Crontab is delayed by 2 hours [duplicate]

I have got a problem with two crontabs that execute some operations on my website: the first one run a command every 3 minutes and the second one at 5am in this way: m h dom mon dow command 0 ...
0
votes
2answers
2k views

Installing PHP extensions to the correct PHP version

We have two versions of PHP on our Linux CentOS6 machine, 5.3.3 and 5.6.7, and wanted to install PHP extensions, memcache and imagick, to 5.6.7. Logged in as root, using yum, we installed both of ...
0
votes
1answer
181 views

Suhosin - Disable shell_exec default, allow from one directory

I have in php ini this function, which blocks shell_exec default. php.ini suhosin.executor.func.blacklist = shell_exec Its works well. When I want to allow shell_exec, so I use in httpd.conf ...
-2
votes
1answer
3k views

How to scp file to remote servers' root directory and run sudo commands?

NOTE: The servers does not share the same password but I will setup no-password login at first. Here's the use case, I need to do these below step by step in my deploy.sh: scp files to remote ...
0
votes
1answer
70 views

Check if user is logged in VSFTPD (from the server)

I need to solve a task with a script. I moving files from a user home directory to another storage regularly (in every 5 minutes and so). How can I detect if this user is logged in (via VSFTPd ...
0
votes
2answers
177 views

Can I get an array as an option argument in bash script

I am writing a shell script and wants to pass multiple options in an argument. Is it possible to do that like using getopts? Requirement example: ./shell.sh -d db1 db2 should pass the values db1 ...
2
votes
2answers
1k views

bash: convert date from to unix timestamp changes timestamp

Running the following command at the xen-servers (either DOM0 or DOMU) at $company gives me a negativ number, on every other system zero (0) (even in my cygwin). date -d "1970-01-01T00:00:00" "+%s" ...
0
votes
0answers
58 views

ForceCommand vs Subsystem

Is there any particula reason why I should use ForceCommand internal-sftp instead of Subsystem sftp iternal-sftp and disabling the shell?
-1
votes
1answer
56 views

understanding the result of this bash script [closed]

I have this simple bash script #!/bin/bash -x for line in `tail /home/user/line` do echo $line done but dont know why it echos all words instead of each line below is output ++ tail ...
-1
votes
4answers
3k views

How to test if two given files are identical?

Just updated the code... I get out everytime on the "else" sequence. You can download the update.sh file from my server. it only contains echo "Hallo update" Updated code (03.11.2015) ...