I want to execute mongo commands in shell script, e.g. in a script test.sh: #!/bin/sh mongo myDbName db.mycollection.findOne() show collections When I execute this script via ./test.sh, then the connection to MongoDB is established, but the following commands are not executed. How to execute other commands through shell script test.sh? 21 Answers 21 You can … Read more
How can I split a command over multiple lines in the shell, when the command is part of an if statement? This works: if ! fab –fabfile=.deploy/fabfile.py –forward-agent –disable-known-hosts deploy:$target; then rc=1 fi This doesn’t work: # does not work: if ! fab –fabfile=.deploy/fabfile.py \ –forward-agent \ –disable-known-hosts deploy:$target; then rc=1 fi Instead of the … Read more
I have a script that automates a process that needs access to a password protected system. The system is accessed via a command-line program that accepts the user password as an argument. I would like to prompt the user to type in their password, assign it to a shell variable, and then use that variable … Read more
I am trying to do a simple condition check, but it doesn’t seem to work. If $# is equal to 0 or is greater than 1 then say hello. I have tried the following syntax with no success: if [ “$#” == 0 -o “$#” > 1 ] ; then echo “hello” fi if [ … Read more
I have a problem with echo in my script: echo -n “Some string…” prints -n Some string… and moves to the next line. In the console it’s working correcly without newline: Some string… 1Best Answer 11 There are multiple versions of the echo command, with different behaviors. Apparently the shell used for your script uses … Read more
I want to read a file and save it in variable, but I need to keep the variable and not just print out the file. How can I do this? I have written this script but it isn’t quite what I needed: #!/bin/sh while read LINE do echo $LINE done <$1 echo 11111———– echo $LINE … Read more
I have this script called test.sh: #!/bin/bash STR = “Hello World” echo $STR when I run sh test.sh I get this: test.sh: line 2: STR: command not found What am I doing wrong? I look at extremely basic/beginners bash scripting tutorials online and this is how they say to declare variables… So I’m not sure … Read more
I’m studying the content of this preinst file that the script executes before that package is unpacked from its Debian archive (.deb) file. The script has the following code: #!/bin/bash set -e # Automatically added by dh_installinit if [ “$1” = install ]; then if [ -d /usr/share/MyApplicationName ]; then echo “MyApplicationName is just installed” … Read more
In a shell script, how do I echo all shell commands called and expand any variable names? For example, given the following line: ls $DIRNAME I would like the script to run the command and display the following ls /full/path/to/some/dir The purpose is to save a log of all shell commands called and their arguments. … Read more
I tried to declare a Boolean variable in a shell script using the following syntax: variable=$false variable=$true Is this correct? Also, if I wanted to update that variable would I use the same syntax? Finally, is the following syntax for using Boolean variables as expressions correct? if [ $variable ] if [ !$variable ] 2 … Read more
