I need to replace the line containing "STAGE_DB" with the line
"STAGE_DB $DB # database that contains the table being loaded ($workingDB)"
Here $DB is passed during the runtime.
How can I do this?
Thanks,
Kousikan (2 Replies)
Hi,
I have a problem. I want to use SED to replace one line with three
It looks like:
PARAM='first_line,second_line,third_line'
And in file:
blablabla
blablabla
PARAM
blablabla
blablabla
blablabla
All I want is to change this into:
blablabla
blablabla
first_line
second_line... (6 Replies)
i have few lines in a file... i am reading them in a while loop so a particular line is held is $line1.. consider a modified line is held in $line2.... i want to replace $line1 with $line2 in the same file... how to do it..?
i have come up till the below code
sed "s/$line1/$line2/g" tmpfile.sql... (5 Replies)
Hi How Are you?
I am doing fine!
I need to go now?
I will see you tomorrow!
Basically I need to replace the entire line containing "doing" with a blank line:
I need to the following output:
Hi How Are you?
I need to go now?
I will see you tomorrow!
Thanks in advance.... (1 Reply)
Hi
I have to replace a pattern found in the first uncommented line in a file. The challenge I'm facing is there are several such similar lines but I have to edit only the first uncommented line.
Eg:
#this is example
#/root/xyz:Old_Pattern
/root/xyz:Old_Pattern
/root/xyz:Old_Pattern
... (10 Replies)
my requirement is,
consider a file output
cat output
blah sdjfhjkd jsdfhjksdh
sdfs 23423 sdfsdf sdf"sdfsdf"sdfsdf"""""dsf
hellow there
this doesnt look good
et cetc etc
etcetera
i want to replace a line of line number 4 ("this doesnt look good") with some other line
... (3 Replies)
All, I appreciate any help you can offer here as this is well beyond my grasp of awk/sed...
I have an input file similar to:
&LOG
&LOG Part: "@DB/TC10000021855/--F"
&LOG
&LOG
&LOG Part: "@DB/TC10000021852/--F"
&LOG Cloning_Action: RETAIN
&LOG Part: "@DB/TCCP000010713/--A"
&LOG
&LOG... (5 Replies)
Sed command to replace a line in a file using line number from the output of a pipe.
Is it possible to replace a whole line piped from someother command into a file at paritcular line...
here is some basic execution flow..
the line number is 412
lineNo=412
Now i have a line... (1 Reply)
Hi all,
Let's say I have a script calling for the two variables PA_VALUE and PB_VALUE.
for pa in PA_VALUE
blah blah
do
for pb in PB_VALUE
blah blah
do
I have a text file with two columns of values for PA and PB.
14.5 16.7
7.8 9.5
5.6 3.6
etc etc
I would like to read this... (7 Replies)
I have few lines in a text file. I am trying to get the line number of uncommented line from the text file using unix shell script.
For example : I want the line number of Orange from the below text file. Here expected answer is 4 since the line 2 is commented.
Apple
#Orange
grapes
Orange (4 Replies)
Discussion started by: Brennon
4 Replies
LEARN ABOUT LINUX
pwconv
PWCONV(8) System Management Commands PWCONV(8)NAME
pwconv, pwunconv, grpconv, grpunconv - convert to and from shadow passwords and groups
SYNOPSIS
pwconv
pwunconv
grpconv
grpunconv
DESCRIPTION
The pwconv command creates shadow from passwd and an optionally existing shadow.
The pwunconv command creates passwd from passwd and shadow and then removes shadow.
The grpconv command creates gshadow from group and an optionally existing gshadow.
The grpunconv command creates group from group and gshadow and then removes gshadow.
These four programs all operate on the normal and shadow password and group files: /etc/passwd, /etc/group, /etc/shadow, and /etc/gshadow.
Each program acquires the necessary locks before conversion. pwconv and grpconv are similar. First, entries in the shadowed file which
don't exist in the main file are removed. Then, shadowed entries which don't have `x' as the password in the main file are updated. Any
missing shadowed entries are added. Finally, passwords in the main file are replaced with `x'. These programs can be used for initial
conversion as well to update the shadowed file if the main file is edited by hand.
pwconv will use the values of PASS_MIN_DAYS, PASS_MAX_DAYS, and PASS_WARN_AGE from /etc/login.defs when adding new entries to /etc/shadow.
Likewise pwunconv and grpunconv are similar. Passwords in the main file are updated from the shadowed file. Entries which exist in the main
file but not in the shadowed file are left alone. Finally, the shadowed file is removed. Some password aging information is lost by
pwunconv. It will convert what it can.
BUGS
Errors in the password or group files (such as invalid or duplicate entries) may cause these programs to loop forever or fail in other
strange ways. Please run pwck and grpck to correct any such errors before converting to or from shadow passwords or groups.
CONFIGURATION
The following configuration variable in /etc/login.defs changes the behavior of grpconv and grpunconv:
MAX_MEMBERS_PER_GROUP (number)
Maximum members per group entry. When the maximum is reached, a new group entry (line) is started in /etc/group (with the same name,
same password, and same GID).
The default value is 0, meaning that there are no limits in the number of members in a group.
This feature (split group) permits to limit the length of lines in the group file. This is useful to make sure that lines for NIS
groups are not larger than 1024 characters.
If you need to enforce such limit, you can use 25.
Note: split groups may not be supported by all tools (even in the Shadow toolsuite). You should not use this variable unless you really
need it.
The following configuration variables in /etc/login.defs change the behavior of pwconv:
PASS_MAX_DAYS (number)
The maximum number of days a password may be used. If the password is older than this, a password change will be forced. If not
specified, -1 will be assumed (which disables the restriction).
PASS_MIN_DAYS (number)
The minimum number of days allowed between password changes. Any password changes attempted sooner than this will be rejected. If not
specified, -1 will be assumed (which disables the restriction).
PASS_WARN_AGE (number)
The number of days warning given before a password expires. A zero means warning is given only upon the day of expiration, a negative
value means no warning is given. If not specified, no warning will be provided.
FILES
/etc/login.defs
Shadow password suite configuration.
SEE ALSO grpck(8), login.defs(5), pwck(8).
System Management Commands 06/24/2011 PWCONV(8)