09-25-2008
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello,
Today, as a root user, i want to copy recursively all files and diretories in a source directory to a destination directory using the following command,
cp -r /home/smith/* /home/bob/
However, I carelessly missed the '*' out when I executed the command.
Now, i noticed a... (1 Reply)
Discussion started by: cy163
1 Replies
2. SCO
Hi Gurus,
I had a question regarding avoiding duplicates.i have a file abc.txt
abc.txt
-------
READER_1_1_1> HIER_28056 XML Reader: Error occurred while parsing:; line number ; column number
READER_1_3_1> Sun Mar 23 23:52:48 2008
READER_1_3_1> HIER_28056 XML Reader: Error occurred while... (0 Replies)
Discussion started by: pssandeep
0 Replies
3. UNIX for Dummies Questions & Answers
I searched the forum, but there was different type of rename.
Hello.
I have files in folder.
Like:
xxxxxxxx1.html
or
xxxxxxxx2.txt
or
xxxxxxxx3.tar.gz
and how to rename or change file extension case to
xxxxxxxx1.htm
or
xxxxxxx2.TXT
or (5 Replies)
Discussion started by: Sheldon
5 Replies
4. Shell Programming and Scripting
Hello guys,
I was looking for a shell script that removes all the special characters from the files and the subdirectories recursively. I could not locate it any more. Dose any body have a similar script that dose that?
Thanks for the help.
AV (0 Replies)
Discussion started by: avatar_007
0 Replies
5. Shell Programming and Scripting
I made menu script for users so they can run other script without going in shell just from menu.
But i must control their input.
These are criteria:
Input must have 4 signs
First two signs are always lower case letters
Input shall not have some special signs just letters and numbers
... (1 Reply)
Discussion started by: waso
1 Replies
6. Shell Programming and Scripting
Hi. Let me start saying that i am kinda new to bash, and have few skills in programming. I've been advised to use bash to manipulate large .csv files. I've been able to do some data filtering using fors, grep and tail commands. That was kinda easy seeing examples. But now i need to do some hard... (1 Reply)
Discussion started by: jmarmitt
1 Replies
7. Shell Programming and Scripting
HI ! all
till date I usually rename file like this
n=201108290000
for file in *.nc; do
file_name=M.m.1.1.1.$n.ready
n=$(( $n+1 ))
mv $file $file_name
donebut in this case I have to rename file depending on basename of file, when I list files results like this, if there is leap... (6 Replies)
Discussion started by: Akshay Hegde
6 Replies
8. Shell Programming and Scripting
I have a special case that awk could be used but I do not have the skill. Trying to create a final output file (indel_parse.txt) that is created from using some information from each of the two files (attached).
parse rules:
The header is skipped FNR>1
1. 4 zeros after the NC_ (not... (2 Replies)
Discussion started by: cmccabe
2 Replies
9. Shell Programming and Scripting
In the bash menu below if the variant that is inputted is in the format NM_004004.3:c.274G>T the below works perfectly. My question is if the variant inputted isNM_004004.3:-c.274G>T or NM_004004.3:+c.274G>T then the code as is will throw an error due to a biological issue. Is it possible to to... (1 Reply)
Discussion started by: cmccabe
1 Replies
10. UNIX for Beginners Questions & Answers
I am trying to rename files with spaces and other characters and not able to be successful.
FileNames:
UPLOAD REFERENCE.xls
UPLOAD MASS REFERENCE.XLS
find /UPLOAD REFERENCE/ -depth -type f -name "* *" -exec rename " " "_" "{}" ";"
The above one is successful to replace spaces... (1 Reply)
Discussion started by: eskay
1 Replies
LEARN ABOUT CENTOS
systemd-readahead-done.service
SYSTEMD-READAHEAD-REPLAY.SERVICE(8) systemd-readahead-replay.service SYSTEMD-READAHEAD-REPLAY.SERVICE(8)
NAME
systemd-readahead-replay.service, systemd-readahead-collect.service, systemd-readahead-done.service, systemd-readahead-done.timer, systemd-
readahead - Disk read ahead logic
SYNOPSIS
systemd-readahead-replay.service
systemd-readahead-collect.service
systemd-readahead-done.service
systemd-readahead-done.timer
/usr/lib/systemd/systemd-readahead/systemd-readahead [OPTIONS...] COMMAND [DIRECTORY | FILE]
DESCRIPTION
systemd-readahead-collect.service is a service that collects disk usage patterns at boot time. systemd-readahead-replay.service is a
service that replays this access data collected at the subsequent boot. Since disks tend to be magnitudes slower than RAM, this is intended
to improve boot speeds by pre-loading early at boot all data on disk that is known to be read for the complete boot process.
systemd-readahead-done.service is executed a short while after boot completed and signals systemd-readahead-collect.service to end data
collection. On this signal, this service will then sort the collected disk accesses and store information about them in /.readahead.
Normally, both systemd-readahead-collect.service and systemd-readahead-replay.service are activated at boot so that access patterns from
the preceding boot are replayed and new data collected for the subsequent boot. However, on read-only media where the collected data cannot
be stored, it might be a good idea to disable systemd-readahead-collect.service.
On rotating media, when replaying disk accesses at early boot, systemd-readahead-replay.service will order read requests by their location
on disk. On non-rotating media, they will be ordered by their original access timestamp. If the file system supports it,
systemd-readahead-collect.service will also defragment and rearrange files on disk to optimize subsequent boot times.
OPTIONS
systemd-readahead understands the following options:
-h, --help
Prints a short help text and exits.
--max-files=
Maximum number of files to read ahead. Only valid for thes collect command.
--file-size-max=
Maximum size of files in bytes to read ahead. Only valid for the collect and replay commands.
--timeout=
Maximum time in microseconds to spend collecting data. Only valid for the collect command.
COMMANDS
The following commands are understood by systemd-readahead:
collect [DIRECTORY]
Collect read-ahead data on early boot. When terminating, it will write out a pack file to the indicated directory containing the
read-ahead data.
replay [DIRECTORY]
Perform read-ahead on the specified directory tree.
analyze [FILE]
Dumps the content of the read-ahead pack file to the terminal. For each file, the output lists approximately how much will be read
ahead by the replay command.
SEE ALSO
systemd(1)
systemd 208 SYSTEMD-READAHEAD-REPLAY.SERVICE(8)