It surprises me that nobody has the correct answer to this. Today i faced exactly the same problem and google didn’t help. After 2 hours i found that when placing a file in /etc/cron.d the schedule line has to contain an extra option….. I allways use this for my crontab -e # Minute Hour Day … Read more
Environment Variables If you want to set a number of environment variables into your docker image (to be used within the containers) you can simply use env_file configuration option in your docker-compose.yml file. With that option, all the entries in the .env file will be set as the environment variables in image and hence into … Read more
In Arch, /bin/sh is a symlink to /bin/bash, which has quite a few rules about startup scripts, with special cases when called sh : If bash is invoked with the name sh, it tries to mimic the startup behavior of historical versions of sh as closely as possible, … If you start it from the … Read more
Bash does not support local functions, but depending on your specific script and architecture you can control the scope of your function name through subshells. By replacing the {..} with (..) in your definition, you’ll get the output you want. The new definition of usage will be limited to the function, but so will e.g. … Read more
You could simply echo (with elevated privileges, of course) directly to the /etc/sudoers file: sudo -i echo ‘nickw444 ALL=(ALL:ALL) ALL’ >> /etc/sudoers # ^^ # tab (note the tab character between the username and the first ALL) Or, for a script: #!/bin/bash # Run me with superuser privileges echo ‘nickw444 ALL=(ALL:ALL) ALL’ >> /etc/sudoers Then … Read more
In the example PWD= /bin/pwd, the variable PWD is set to the empty string before executing the command /bin/pwd. The change only takes effect for that line. This can be useful to make a temporary change to a variable for the purposes of running a command, without affecting the original value. Another example of this … Read more
To do it in place, if your sed supports the -i option, you can do: sed -i ‘/^string/d’ input-file
$? is a variable holding the return value of the last command you ran. Example C program (example.c): int main() { return 1; } Example Bash: gcc -o example example.c ./example echo $? # prints 1
I think this would be helpful, find . -mmin -2 -type f -print also, find / -fstype local -mmin -2
If your sh really is sh and not just bash being run as sh then this will work just fine if [ `expr $n % 5` -eq 0 ] then # do something fi If your sh is really bash then put your test in (( )) like so if (( $n % 5 == … Read more