I want to list all files created in a day but it doesn't work
$ day=\'`date "+%b %d"`\'
$ echo $day
>>> 'Mar 12'
$ ll |grep $day
>>> can't open 12'
????? please help me (3 Replies)
I am doing "ps -f" to see my process.
but I get lines that one of it represents the ps command itself.
I want to grep it out using -v flag, but than I get another process that belongs to the GREP itself :
I would like to exclude
# ps -f
UID PID PPID C STIME TTY TIME CMD... (2 Replies)
In my file contains special characters,alphanumerics all thease characters
how to search the pattern between two strings that contains special characters
Ex: find pattern between allocation_map_128*2 to creative.clicks_allocate != KNULL
so there are special characters in my... (1 Reply)
Hi,
I am new to UNIX environment, to find a contents from a given files i have used the command "grep -l "<search word>" *.txt, it is given the file names which contains that particular word, but it is anyway to get entire details of the file .., i need the output like ls -ltr, filename... (3 Replies)
Hi guys, i wondering with any1 could help me with this.
I have this script will i need to "grep" an integer form a file x2. If the value is 0 then it's ok. But anything greater then 0, i'll ask the script to echo an error message. This is how the script looks like:
MESSAGEFILE=x2
STRING="0"
... (5 Replies)
i want to search in the current directory all the files that contain one word for example "hello"
i want to achieve it with the grep command but not with the grep * (2 Replies)
Hi, im taking an entry Unix class, and as part of my lab assignment I have to copy all files in the /home/david/lab3 directory that have the file extension .save to your lab3/temp directory. I'm having trouble getting the grep to do anything worth while
I've been trying to do:
cp... (6 Replies)
I have one text file, contains some values like <Q1:Name>1000000</Q1:Name>. I want to read the values and stores into an array for searching the each values into a file locations.
If I use this
find location |xargs grep -l "<Q1:Location>100000055042</Q1:Location>",I get the files, are having... (7 Replies)
Hello,
I am running below command as root user
#nodetool cfstats tests | grep "Memtable switch count"
Memtable switch count: 12
Where as when I try to run same command as another user it gives different result.
#su -l zabbix -s /bin/bash -c "nodetool cfstats tests | grep "Memtable switch... (10 Replies)
Discussion started by: Pushpraj
10 Replies
LEARN ABOUT CENTOS
blkdeactivate
BLKDEACTIVATE(8)BLKDEACTIVATE(8)NAME
blkdeactivate - utility to deactivate block devices
SYNOPSIS
blkdeactivate [options] [device...]
DESCRIPTION
blkdeactivate utility deactivates block devices. If a device is mounted, the utility can unmount it automatically before trying to deacti-
vate. The utility currently supports device-mapper devices, including LVM volumes. LVM volumes are handled directly using the lvm command.
Other device-mapper based devices are handled using the dmsetup command.
OPTIONS -e, --errors
Show errors reported from tools called by blkdeactivate. Without this option, any error messages from these external tools are sup-
pressed and the blkdeactivate itself provides only a summary message about device being skipped or not.
-h, --help
Display the help text.
-u, --umount
Unmount a mounted device before trying to deactivate it. Without this option used, a device that is mounted is not deactivated.
-v, --verbose
Run in verbose mode.
-d, --dmoption dm_options
Comma separated list of device-mapper specific options.
-l, --lvmoption lvm_options
Comma separated list of LVM specific options.
DM_OPTIONS
retry Retry removal several times in case of failure.
force Force device removal. See dmsetup(8) for more information.
LVM_OPTIONS
retry Retry removal several times in case of failure.
wholevg
Deactivate the whole LVM Volume Group when processing a Logical Volume. Deactivating Volume Group as a whole takes less time than
deactivating each Logical Volume separately.
EXAMPLES
Deactivate all supported block devices found in the system. If a device is mounted, skip its deactivation.
blkdeactivate
Deactivate all supported block devices found in the system. If a device is mounted, unmount it first if possible.
blkdeactivate -u
Deactivate supplied device together with all its holders. If any of the devices processed is mounted, unmount it first if possible.
blkdeactivate -u /dev/vg/lvol0
Deactivate all supported block devices found in the system. Retry deactivation of device-mapper devices in case the deactivation fails.
Deactivate the whole Volume Group at once when processing an LVM Logical Volume.
blkdeactivate -u -d retry -l wholevg
Deactivate all supported block devices found in the system. Retry deactivation of device-mapper devices in case the deactivation fails and
force removal.
blkdeactivate -d force,retry
SEE ALSO lsblk(8)umount(8)dmsetup(8)lvm(8)Red Hat, Inc LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26) BLKDEACTIVATE(8)