Hi ,
I need a script which basically deltes all files in folder a which are alreasy present in folder b
say folder a has files abc.txt
pqr .txt
and b has abc.txt
pqr.txt
rmr.txt
then file abc.txt and pqr.txt from a should be deleted (6 Replies)
Hi all,
I amd new in UNIX programming. I have a query.
I need to delete some files (like .dec files) from some folders. I have a list of folders. What will be command for it.
Please help me.
Thanks in Advance. (6 Replies)
Hi,
i have the directory structure
directory /home/ncs/controller/logs/
in this path i have following directories
cl03032010
cl04032010
cl05032010
cl06042010
i want to delete the folders which are 2 weeks old.. through the crontab (2 Replies)
I am using the below command to delete files from directories and subdirectories
find /test/abc/xyx -type f -mtime +7 -exec rm -f {} \;
there are some subfolders in xyx for which i don't have permission to delete.
Is there a way i can check the permission of the folder first and then delete... (4 Replies)
Hello
I am writing a script that will first execute ps to get the list of processes running, and the go into the /proc folder for each PID listed and gather relevant information.
I looked through the contents of a particular process in the /proc folder and I can't find where I can locate... (2 Replies)
I need help. I have to create a script which will delete multiple directory (folders) that are two months old. Example, I have folders dated April, May, June and July. I have to delete folders April and May and retain June and July and as such that when the July month lapse, the folder June will be... (2 Replies)
Hi All,
I need a solution for the following scenario.
I am the owner for the particular folder and I have given 777 permissions for some specific reasons. So others can able to create folders and files.
But when I am done with the work, I need to delete the folders which are created by... (4 Replies)
Hi Team,
I am new to shell script and there is a requirement where files should be moved from Subfolder to parent folder.
Eg:
parent folder --> /Interface/data/test/IN
Sub folder -->/Interface/data/test/IN/Invoice20180607233338
Subfolder will be always with timestamp... (6 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)
Discussion started by: humble_learner
3 Replies
LEARN ABOUT ULTRIX
fgrep
grep(1) General Commands Manual grep(1)Name
grep, egrep, fgrep - search file for regular expression
Syntax
grep [option...] expression [file...]
egrep [option...] [expression] [file...]
fgrep [option...] [strings] [file]
Description
Commands of the family search the input files (standard input default) for lines matching a pattern. Normally, each line found is copied
to the standard output.
The command patterns are limited regular expressions in the style of which uses a compact nondeterministic algorithm. The command patterns
are full regular expressions. The command uses a fast deterministic algorithm that sometimes needs exponential space. The command pat-
terns are fixed strings. The command is fast and compact.
In all cases the file name is shown if there is more than one input file. Take care when using the characters $ * [ ^ | ( ) and in the
expression because they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '.
The command searches for lines that contain one of the (new line-separated) strings.
The command accepts extended regular expressions. In the following description `character' excludes new line:
A followed by a single character other than new line matches that character.
The character ^ matches the beginning of a line.
The character $ matches the end of a line.
A . (dot) matches any character.
A single character not otherwise endowed with special meaning matches that character.
A string enclosed in brackets [] matches any single character from the string. Ranges of ASCII character codes may be abbreviated
as in `a-z0-9'. A ] may occur only as the first character of the string. A literal - must be placed where it can't be mistaken as
a range indicator.
A regular expression followed by an * (asterisk) matches a sequence of 0 or more matches of the regular expression. A regular
expression followed by a + (plus) matches a sequence of 1 or more matches of the regular expression. A regular expression followed
by a ? (question mark) matches a sequence of 0 or 1 matches of the regular expression.
Two regular expressions concatenated match a match of the first followed by a match of the second.
Two regular expressions separated by | or new line match either a match for the first or a match for the second.
A regular expression enclosed in parentheses matches a match for the regular expression.
The order of precedence of operators at the same parenthesis level is the following: [], then *+?, then concatenation, then | and new
line.
Options-b Precedes each output line with its block number. This is sometimes useful in locating disk block numbers by context.
-c Produces count of matching lines only.
-e expression
Uses next argument as expression that begins with a minus (-).
-f file Takes regular expression (egrep) or string list (fgrep) from file.
-i Considers upper and lowercase letter identical in making comparisons and only).
-l Lists files with matching lines only once, separated by a new line.
-n Precedes each matching line with its line number.
-s Silent mode and nothing is printed (except error messages). This is useful for checking the error status (see DIAGNOSTICS).
-v Displays all lines that do not match specified expression.
-w Searches for an expression as for a word (as if surrounded by `<' and `>'). For further information, see only.
-x Prints exact lines matched in their entirety only).
Restrictions
Lines are limited to 256 characters; longer lines are truncated.
Diagnostics
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.
See Alsoex(1), sed(1), sh(1)grep(1)