-e is redundant here. If your SED supports extended regexps:
The ( ) brackets group a whole section, after which is a + for "one or more repeats of this expression".
The & has to be escaped in the output expression as \&, otherwise & has the special meaning "the entire matched expression" which would end up adding MORE
Question though: If specific numbers of non-breaking spaces aren't meant to be there, are any non-breaking spaces meant to be there? Why not replace them entirely with non-breaking spaces?
Hi
I have installed solaris 10 on an intel machine. Logged in as root. In CDE, i open terminal session, type login alex (normal user account) and password and i get this message
No utpmx entry: you must exec "login" from lowest level "shell" :confused:
What i want is: open various... (0 Replies)
Do someone know how to delete entry(some lines)
in file "wtmpx" that command "last" use it.
this file is binary so I cannot edit directy.
=========================
#last
root pts/1 noc Fri Mar 3 22:04 still logged in
root pts/1 noc Fri Mar 3 22:01 - 22:02 ... (4 Replies)
Hi,
I've modified the syslogd source to include a thread that will keep track of a timer(or a timer thread). My intention is to check the file size of /var/log/messages in every one minute & if the size is more than 128KB, do a echo " " > /var/log/messages, so that the file size will be set... (7 Replies)
When trying to open a document with VI editor, getting the following error..
E558: Terminal entry not found in terminfo
'vt100' not known. Available builtin terminals are:
builtin_gui
builtin_riscos
builtin_amiga
builtin_beos-ansi
builtin_ansi
builtin_pcansi
... (8 Replies)
Hi All,
I have working (Perl) code to combine 2 input files into a single output file using the join function that works to a point, but has the following limitations:
1. I am restrained to 2 input files only.
2. Only the "matched" fields are written out to the "matched" output file and... (1 Reply)
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
I need to replace dashes (i.e. -) if present from positions 351-357 with zero (i.e. 0), I also need to replace dash (i.e “-“) if present between position 024-043 with zero (i.e. 0) & I replace " " (i.e. 2 space characters) if present at position 381-382 with "04". Total length of record is 413.... (11 Replies)
please use code tags, thanks
Initially olcDatabase={2}config.ldif file was in non-prod and it does not have any entries of database and password as well that is why I was getting error as “ldap_bind: Invalid credentials (49)”¯ , I was comparing with my production olcDatabase={2}config.ldif file ... (1 Reply)
I am trying find files in sub dir with certain tags using tag command, and add the period to the beginning. I can't use chflags hidden {} cause it doesn't add period to the beginning of the string for web purpose. So far with my knowledge, I only know mdfind or tag can be used to search files with... (6 Replies)
Discussion started by: Nexeu
6 Replies
LEARN ABOUT PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6)NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')'
e2: e3
| e2 REP
REP: '*' | '+' | '?'
e1: e2
| e1 e2
e0: e1
| e0 '|' e1
A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never
matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s,
the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
may appear unescaped.
A matches any character.
A matches the beginning of a line; matches the end of the line.
The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres-
sion.
SEE ALSO awk(1), ed(1), sam(1), sed(1), regexp(2)REGEXP(6)