Single quotes prevent the shell from evaluating pretty much everything - including other single quotes.
In much the same way that it's easier (in some cases only possible) to replace / in a string by not using / as a delimiter, so the same is true of ' (easier not to use it). Not to say that you can't use it:
I am trying to write a script that kills old sessions, I've posted here over the past few days and the script is just about perfect except I want to be given the option to exclude specified PIDs from being killed. this is the entire script:
if
then
rm /tmp/idlepids
fi
if
then
rm... (2 Replies)
Greetings! I found this fourm via a google search on "sed expressions".
I have a file that contains notices and they are all the same length in lines. For example the file would contains 15 notices, each being 26 lines each. I need some way to eliminate notices that contain a "S" in a particular... (8 Replies)
Hello all,
How would I go to a particular line in a file and remove certain text from it and replace with something that I want it to be there.
like: file /etc/abc
now look for line HOME="/export/xyz" in /etc/abc
and then replace with HOME=/"export/xyz1"
thanks in advance guys. (1 Reply)
All,
So, I have an ldif file that contains about 6500 users worth of data. Some users have a block of text I'd like to remove, while some don't.
Example (block of text in question is the block starting with "authAuthority: ;Kerberosv5"):
User with text block:
# username, users,... (7 Replies)
Hi all...
I want to delete the entire text of the file and want to make it zero byte..
would you please tell me the command for it.
Thanks and regards
Vijay sahu (4 Replies)
Hello,
I got files full path in a text file like that
/main/k/kdelibs/kdelibs4c2a_3.5.10.dfsg.1-2ubuntu7_i386.deb
/main/k/kdelibs-experimental/libknotificationitem-dev_4.3.2-0ubuntu1_i386.deb
/main/k/kdemultimedia/dragonplayer_4.3.2-0ubuntu1_i386.deb... (13 Replies)
Need help whit a script where I have to input a name and then remove a line where that name is in a file
file ex:
001op;Name;Location;date
002op;Name;Location;date
and so on....
can anybody help me???
thanks (4 Replies)
Hello Friends,
I am stuck with the below problem.Any help will be appreciated.
I have a file which has say 100 lines.
On the second last line I have a line from which i want to remove certain characters..
e.g
CAST(CAST( A as varchar(50)) || ',' ||
CAST(CAST( B as varchar(50)) || ',' ||... (8 Replies)
Trying to use sed to, in-place, remove specific text from a file. Since there are / in the text I use | to escape that character. Thank you :).
sed -i -e 's|xxxx://www.xxx.com/xx/xx/xxx/.*/|' /home/cmccabe/list
sed: -e expression #1, char 51: unterminated `s' command (4 Replies)
Hello experts,
I have a text file with lot of curly brackets (both opening { & closing } ). I need to delete them alongwith the text between opening & closing brackets' pair.
For ex: Input:-
59. Rh1 Qe4 {(Qf5-e4 Qd8-g8+ Kg6-f5
Qg8-h7+ Kf5-e5 Qh7-e7+ Ke5-f5 Qe7-d7+ Qe4-e6 Qd7-h7+ Qe6-g6... (6 Replies)
Discussion started by: prvnrk
6 Replies
LEARN ABOUT V7
dp
DP(8) [nmh-1.5] DP(8)NAME
dp - parse dates 822-style
SYNOPSIS
/usr/lib/mh/dp [-form formatfile] [-format string] [-width columns] [-version] [-help] dates ...
DESCRIPTION
Dp is a program that parses dates according to the ARPA Internet standard. It also understands many non-standard formats, such as those
produced by TOPS-20 sites and some UNIX sites using ctime(3). It is useful for seeing how nmh will interpret a date.
The dp program treats each argument as a single date, and prints the date out in the official 822-format. Hence, it is usually best to
enclose each argument in quotes for the shell.
To override the output format used by dp, the -format string or -format file switches are used. This permits individual fields of the
address to be extracted with ease. The string is simply a format string and the file is simply a format file. See mh-format(5) for the
details.
Here is the default format string used by dp:
%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>
which says that if an error was detected, print the error, a `:', and the date in error. Otherwise, output the 822-proper format of the
date.
FILES
$HOME/.mh_profile The user profile
PROFILE COMPONENTS
None
SEE ALSO ap(8), Standard for the Format of ARPA Internet Text Messages (RFC-822)
DEFAULTS
`-format' default as described above
`-width' default to the width of the terminal
CONTEXT
None
BUGS
The argument to the -format switch must be interpreted as a single token by the shell that invokes dp. Therefore, one must usually place
the argument to this switch inside quotes.
MH.6.8 11 June 2012 DP(8)