12-09-2017
Script to show alert when today's total download has exceeded 500mb, 1 gb, 1500mb and 1800mb
Hey,
I'm new to learning scripting with linux bash shell. And, I was thinking I'd learn linux by learning to solve a problem. So, I currently use a internet connection which allots me 2GB starting from 12:01 am in my timezone to 11.59pm. But, occasionally when I watch videos from youtube, my bandwidth runs out and I'm stuck with zero internet. So, I was thinking it would be fantastic if I could write a linux script which would show me an alert on my screen top right corner as and when every 500mb,1GB, 1500mb and 1800mb has been used up.
Would love to have your inputs for the same.
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RBASH(1) General Commands Manual RBASH(1)
NAME
rbash - restricted bash, see bash(1)
RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a filename containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO
bash(1)
GNU Bash-4.0 2004 Apr 20 RBASH(1)