Only in an interactive bash shell (i.e. the command line), an exclamation mark followed by an alphanumeric character does history substitution.
For example
prints line 1 from the command history.
Fortunately a bash script never does history substitution; a set +H work-around is not needed there.
This User Gave Thanks to MadeInGermany For This Post:
I was wondering how I can modify this for loop, so it only loops through the filenames that do not have an ".old" extension.
for filename in $(ls "$1")
do
echo $filename | grep '\.old$' > /dev/null
if
then mv $1/$filename $1/$filename.old
fi
done (5 Replies)
Hi,
Following is my code and the file FILE_LIST_EXCESS.txt has 40 file names in it
while read LineIn
do
echo ${LineIn}
`ftp -vin << END_INPUT >> ${PID}_DS_GET_Log.log 2>&1
open servername
user userid password
cd FileDir
get ${LineIn}
END_INPUT`... (4 Replies)
I have 2 files one of them has all the all mac addresses and the other one has all the ip addresses. Basically, I want to loop thru those 2 files and generate a configuration like below:
host www184.domain.com {
hardware ethernet 00:13:72:3B:B4:3A;
fixed-address 192.168.0.184;
}... (4 Replies)
function ext
{
echo "THANKS & WELCOME BACK"
}
function upc
{
echo "TO EXPORT UPROC GIVE UPROC NAME PER LINE IN THE input.txt and PRESS Y"
echo "TO GO BACK PRESS 99"
read parm0
if ;
then
start
elif ;
then
for i in `cat input.txt` ; do
echo $i
$UXEXE/uxext upr upr=$i... (0 Replies)
Hi, my script is waiting for 3 files to come to a folder for 30 min but even when all the files arrive in the folder it's still waiting for these three files. Files can come with in 2 min and I want it to start processing them immediately after all the files arrive in the folder.
until ; do... (3 Replies)
sup experts..i had a script which was bugging me..was hoping someone could point out the issue here
Input file: space separated 2 columns
I wanted to print out the 2 columns after assigning them to variables ( bascially the same output but iterate through line by line ). The code worked... (7 Replies)
Hi,
I am trying to move a file from remote server to local server and when the transfer completes successfully i call a script in remote server to remove the file which was successfully transferred.
I do this by first getting the list of file in remote server and move the text file to local... (8 Replies)
Hi,
i=0
t5=6000001
while
do
i=`expr $i + 1`
t5=`expr $t5 + 1`
echo $t5
done
I am able to increment "col3" value but unable to get col1,col2 value.
Input:
t1=10001
t2=abc
t3=ghkc (5 Replies)
Hi,
I have prepared a script to search for backup file information on the Linux server. Script works fine for the most part except the echo statement inside an IF conditional block displays the message ''snapshot directory not found on xxxxx" even though the .snapshot directory is found a... (11 Replies)
Hi Team,
I have for loop in my shell script. Which basically loop through all files in the directory, When some files are in the directory it works just fine.
But if there are no files at all..still the for loop try to execute. Please help. Below is the code.
#!/bin/ksh
echo "Program... (5 Replies)
Discussion started by: bharath561989
5 Replies
LEARN ABOUT DEBIAN
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)