i need to check if any user has logged-in more than once in different terminals and then print the count of those login, so i wrote this command,
who -H | wc -l
but i feel its not accurate , something is wrong ,i have been trying for a long time by trial n error to solve it, but i need... (2 Replies)
I was trying to see all combinations of foreground and background colors in BASH.
This works fine for me,
echo -e '\E[37;46m TEXT'
but when I tried the below script, the variables i and j do not expand.
#!/bin/sh
for i in `seq 30 37` # foreground
do
for j in `seq 40... (4 Replies)
Hi,
I am using BASH. In a directory there are files that match either of the following 2 patterns: *.L1A_AC* or S*.L1A_MLAC*
I would like to write a script that will include a for loop, where for each file in the directory, a certain function will be performed. For example:
for FILE in... (4 Replies)
I jus want to know the meaning of the below command line(exclamation following that re-direction)
sqlplus -s `cat /home/sample.txt` <<!
Thanks!! (1 Reply)
Hi ,
Struck with one basic question.
Iam expecting word count of 4 where "wc" is showing as 5 .
# echo "abcd" | wc
1 1 5
# echo abcd | wc
1 1 5 (5 Replies)
Hello All,
I am setting up a cron job, where i am calling a shell script to make few builds. I got struck at a point, need some expert inputs to proceed further.
The script is categorized in 5 parts and in the last part while building software it asks for few questions like:-
1. Build mode... (4 Replies)
in my shell script requirement is to search and replace the file with variable so i use the following command sed -i "s/abc/$SCHEMA/g" table.sql
later when the script runs sqlplus username/pwd@Table& this & is not letting the variable to replace the value inside the file .please let me know... (1 Reply)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies
LEARN ABOUT LINUX
rbash
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 file name 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)