How to escape the @ character in an if statement check?
Hi,
I am running a shell script that has to verify a password with an if statement. The password has an @ in it. I am having problems getting the if statement to test for the password. The @ causes problem. I tried the standard backslash escape but it did not work for me.
How can I do it?
I want to replace a string which contains "/" in vi but what is the escape character for forward slash?
e.g. I have a text file with the contents below and I want to replace "/Top/Sub/Sub1" with "ABC".
/Top/Sub/Sub1
The replace command I am using is ... (4 Replies)
Hi ,
I want to change space to ' in my script.
I tried doing this,
sed 's/ /\'/g' filename
but i could not get it.
can some one help me please.
Thanks,
Deepak (4 Replies)
Hi All,
How do i write in sed for the 6th and 7th field of etc/passwd file as it involves "/" character?
Does mine below is correct? It's incomplete script as i need help with syntax as i always getting may errors :(
Example of etc/passwd file:
blah:x:1055:600:blah... (6 Replies)
Hello experts
I am trying to write a shell script which will add ' ' to a unix variable and then pass it to oracle for inserting to a table.
I am running the script as root and I have to do a su -c .
The problem is the character ' is not recognised inside sed even after adding escape... (1 Reply)
my @array;
my $sepa = "|";
print $sepa;
open FH, "<100_20091023_2.txt";
while(<FH>){
push @array, split(/\$sepa/, $_);
print "@array\n\n";
}
I am not able split the line which have | separated (1 Reply)
I am having issues escaping special characters in my AWK script as follows:
for id in `cat file`
do
grep $id in file2 | awk '\
BEGIN {var=""} \
{ if ( /stringwith+'|'+'50'chars/ ) {
echo "do this"
} else if ( /anotherString/ ) {
echo "do that"
} else {
... (4 Replies)
i have string as below
str=".<date>"
in which i need to replace < with /< , when i tried with sed , got the output.
--> echo $str | sed 's/</\\</g'
.\<date>
when i tried to assign it to a variable , i am not getting the same
--> a=`echo $str | sed 's/</\\</g'` ; echo $a... (4 Replies)
My input is:
jdbc:Oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.147.109.211)(PORT=1526))(CONNECT_DAT A=(SID= MWDBD22)))
In the search pattern, ( and ) and . and @ are special RE, and need to be escaped \( and \) and \. and \@
how can i do it by script or command (9 Replies)
friends,
I have a situation where i am using a $RANDOM function along with the filename, I want this to be escaped by the OS in the first assignment (works as expected) and executed in the second assignment (does not execute $RANDOM)
filename1=filename1_\$RANDOM
echo $filename1... (3 Replies)
Hi ,
I am looking for a function which will do the following.
1. I have a variable which will hold few special chracter like
SPECIAL_CHARS="& ;"2. I have an escape character.
ESCAPE_CHAR="\"3. Now when I passed some string in the function it will return the same string but now it will... (8 Replies)
Discussion started by: Anupam_Halder
8 Replies
LEARN ABOUT CENTOS
systemd-ask-password
SYSTEMD-ASK-PASSWORD(1) systemd-ask-password SYSTEMD-ASK-PASSWORD(1)NAME
systemd-ask-password - Query the user for a system password
SYNOPSIS
systemd-ask-password [OPTIONS...] [MESSAGE]
DESCRIPTION
systemd-ask-password may be used to query a system password or passphrase from the user, using a question message specified on the command
line. When run from a TTY it will query a password on the TTY and print it to STDOUT. When run with no TTY or with --no-tty it will query
the password system-wide and allow active users to respond via several agents. The latter is only available to privileged processes.
The purpose of this tool is to query system-wide passwords -- that is passwords not attached to a specific user account. Examples include:
unlocking encrypted hard disks when they are plugged in or at boot, entering an SSL certificate passphrase for web and VPN servers.
Existing agents are: a boot-time password agent asking the user for passwords using Plymouth; a boot-time password agent querying the user
directly on the console; an agent requesting password input via a wall(1) message; an agent suitable for running in a GNOME session; a
command line agent which can be started temporarily to process queued password requests; a TTY agent that is temporarily spawned during
systemctl(1) invocations.
Additional password agents may be implemented according to the systemd Password Agent Specification[1].
If a password is queried on a TTY, the user may press TAB to hide the asterisks normally shown for each character typed. Pressing Backspace
as first key achieves the same effect.
OPTIONS
The following options are understood:
-h, --help
Prints a short help text and exits.
--icon=
Specify an icon name alongside the password query, which may be used in all agents supporting graphical display. The icon name should
follow the XDG Icon Naming Specification[2].
--timeout=
Specify the query timeout in seconds. Defaults to 90s. A timeout of 0 waits indefinitely.
--no-tty
Never ask for password on current TTY even if one is available. Always use agent system.
--accept-cached
If passed, accept cached passwords, i.e. passwords previously typed in.
--multiple
When used in conjunction with --accept-cached accept multiple passwords. This will output one password per line.
EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise.
SEE ALSO systemd(1), systemctl(1), plymouth(8), wall(1)NOTES
1. systemd Password Agent Specification
http://www.freedesktop.org/wiki/Software/systemd/PasswordAgents
2. XDG Icon Naming Specification
http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
systemd 208SYSTEMD-ASK-PASSWORD(1)