Your requirements can produce a very involved solution.
Since you already know how to sort/head/cut, it seems that your major issue is with the regular expression.
This piece of code will produce a regular expression to display strings with dates in the format YYYYMMDD:
From here you can change this code to include other data manipulations, including other date formats (MMDDYY, DDMMYYYY, etc.).
This User Gave Thanks to Shell_Life For This Post:
hello people
i need your help please
i want to achieve the following with the simplest, most efficient shell-tools:
i have a directory with a lot of files from users.
the script should check which partition the dir is on
if the partition with the directory is more than 90% full
... (2 Replies)
I know this gets covered quite a bit in the forum and I think there is enough there for me to figure out how to do what I am trying to do, I just don't think I would do it very efficiently so I am going to ask the question...
I have database log files with date and time stamps in the file like
... (7 Replies)
Hi,
We've a list of files that gets created on a weekly basis and it has got a date and time embedded to it. Below are the examples. I want to find out how to get the latest files get the date and time stamp out of it.
Files are
PQR123.PLL.M989898.201308012254.gpg... (1 Reply)
Hello,
I'd like to write a monthly archive script that archives some logs. But I'd like to do it based on yesterday's date. In other words, I'd like to schedule the script to run on the 1st day of each month, but have the archive filename include the previous month instead.
Here's what I... (5 Replies)
I have file listed like below
-rw-r--r--+ 1 test test 17M Nov 26 14:43 test1.gz
-rw-r--r--+ 1 test test 0 Nov 26 14:44 test2.gz
-rw-r--r--+ 1 test test 0 Nov 27 10:41 test3.gz
-rw-r--r--+ 1 test test 244K Nov 27 10:41 test4.gz
-rw-r--r--+ 1 test test 17M Nov 27 10:41 test5.gz
I... (5 Replies)
My unix version is IBM AIX Version 6.1
I tried google my requirement and found the below answer,
find . -newermt “2012-06-15 08:13" ! -newermt “2012-06-15 18:20"
But newer command is not working in AIX version 6.1 unix
I have given my requirement below:
Input:
atr files:
... (1 Reply)
HI,
Can anyone tell me how to pull the date and file name separated by a space using the find command or any other command. I want to look through several directories and based on a date timeframe (find -mtime -7), output the file name (without the path) and the date(in format mmddyyyy) to a... (2 Replies)
Hi,
I have a script doing backup to synology server, the script create new folder each day with the date as being folder name i.e. 2018-07-30. Just before creating the new folder I want the script to find the oldest folder from the list and delete it including its content.
for example... (3 Replies)
Suppose i have a list of files in a directory as mentioned below
1. Shankar_04152019_ny.txt
2. Gopi_shan_03122019_mi.txt
3. Siva_mourya_02242019_nd.txt
..
.
.
.
.
1000 . Jiva_surya_02282019_nd.txt
query : At one shot i want to modify the above all filenames present in one path with... (4 Replies)
Discussion started by: Shankar455
4 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)