Given this is homework, I'll only hint. First, I think you are on the right track with these:
You want to find all regular files in the directory, print the filename to stdout, and display the first line. So your solution would be the combination of these two commands that you've experimented with that do just that.
The first command probably isn't listing the file name, and the second command isn't considering all files.
Hi All,
How can the head command be used to extract only a particular line.
By default head -n filename displays the first n lines. I want only the nth line.
I couldn't get it from forum search.
Thanks,
Sumesh (6 Replies)
Yes , I have to find a file in unix without using any find or where commands.Any pointers for the same would be very helpful as i am beginner in shell scritping and need a solution for the same.
Thanks in advance.
Regards
Jatin Jain (10 Replies)
Hi friends,I am new to unix and this is really a dummy question.but please help me out.
How to simulate head command without using head command???
also tail command too,also more command.
it is given as a homework to do....please tell me how to do (2 Replies)
Hi, I have the following problem. I have files with one column of data (let's say file1.dat, file2.dat...file6.dat), and I would like to record the first value of the column of each file into another file (let's name it fileall.dat), which would have the the six values, one in each column. I use to... (4 Replies)
i have lots of files in /law/prod and /law/dev, such as AP20PD, AP20WS, AP20.scr, AP20.rpt
if i am in /law DIR
find . -name AP20PD, found in /law/prod and /law/dev
i want to head -1 AP20PD from both location and >> /tmp/test.log
can i use find and head in one line ?
----------... (1 Reply)
Hi,
I need some advise on whether there is a better way of doing what I am currently planning to do. Perhaps I should be using arrays instead of re-directing output to files?
I need to use a tool/program named ADRCI provided by Oracle to remove trace files that it generates. Honestly it is... (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Write a script that allows the user to print the first n lines or the last n lines of every file in the... (18 Replies)
we have a file as below
AREA,COUNTRY,RANK
A,MX,1
A,MX,2
A,MX,5
A,MX,8
A,IN,7
A,IN,5
A,IN,21
B,CN,6
B,CN,2
B,CN,8
B,CN,0
we need the TOP 2 RANK records for the combination of Area, Country as below. i know head -2, which gives top 2 records from file but not sure it lists based on... (7 Replies)
Discussion started by: JSKOBS
7 Replies
LEARN ABOUT ULTRIX
find
find(1) General Commands Manual find(1)Name
find - find files
Syntax
find pathname-list expression
Description
The command recursively descends the directory hierarchy for each pathname in the pathname-list (that is, one or more pathnames) seeking
files that match a boolean expression written in the primaries given below. In the descriptions, the argument n is used as a decimal inte-
ger where +n means more than n, -n means less than n , and n means exactly n.
Options-atime n Tests true if the file has been accessed in n days.
-cpio output Writes current file on output in the format (5120-byte records) specified in the reference page. The output can be either a
file or tape device. If output is a tape device the B key must be used to read data from the tape.
-ctime n Tests true if the file has been changed in n days.
-depth Always true; causes descent of the directory hierarchy to be done so that all entries in a directory are acted on before the
directory itself (that is, postorder instead of preorder). This can be useful when is used with to transfer files that are
contained in directories without write permission.
-exec command Tests true if specified command returns a 0 on exit. The end of the command must be punctuated by an escaped semicolon. A
command argument `{}' is replaced by the current pathname.
-group gname Tests true if group ID matches specified group name.
-inum n Tests true if the file has inode number n.
-links n Tests true if the file has n links.
-mount Tests true if the current file is on the same file system as the current starting pathname.
-mtime n Tests true if the file has been modified in n days.
-name filename Tests true if the filename argument matches the current file name. Normal Shell argument syntax may be used if escaped
(watch out for `[', `?' and `*').
-newer file Tests true if the current file has been modified more recently than the argument file.
-ok command Executes specified command on standard output, then standard input is read and command executed only upon response y.
-perm onum Tests true if file has specified octal number. For further information, see If onum is prefixed by a minus sign, more flag
bits (017777) become significant and the flags are compared: (flags&onum)==onum. For further information, see
-print Prints current pathname.
-size n Tests true if the file is n blocks long (512 bytes per block).
-type c Tests true if file is c type ( c = b, block special file: c, character special file: d, directory: f, plain file: l, sym-
bolic link: p, type port: s, type socket).
-user uname Tests true if file owner is login name or numeric user ID.
The primaries may be combined using the following operators (in order of decreasing precedence):
1) A parenthesized group of primaries and operators (parentheses are special to the Shell and must be escaped).
2) The negation of a primary (`!' is the unary not operator).
3) Concatenation of primaries (the and operation is implied by the juxtaposition of two primaries).
4) Alternation of primaries (`-o' is the or operator).
Examples
To remove all files named `a.out' or `*.o' that have not been accessed for a week:
find / ( -name a.out -o -name '*.o' )
-atime +7 -exec rm {} ;
To find all files on the root file system type:
find / -mount -print
To write all the files on the root file system to tape:
find / -mount -print -cpio /dev/rmt?h
cpio -iBvt < /dev/rmt?h
To find all the mount points on the root file system type:
find / ! -mount -print
FilesSee Alsocpio(1), sh(1), test(1), cpio(5), fs(5)find(1)