You can use the following command to change Specific string on all files under specific directory:
find /u01/directory -type f | xargs perl -pi~ -e ‘s/oldtext/newtext/g;’
Tested on Linux & AIX
Ref:
https://blogs.oracle.com/rammenon/recursively-replacing-a-string-in-all-files-in-a-directory-linux
After a customer had performed some bad edits on various LDAP configuration files, users were locked out and unable to access the system. Root could still login however.
I logged in as root, and rather than mess with various config files, eg under /etc/pam.d, ran this command to disable LDAP authentication and enable “normal” authentication using /etc/shadow:
– Scan New Hardware:
scsi-rescan
rescan-scsi-bus.sh –forcerescan
– For Physical Volumes:
pvdisplay
pvscan
pvcreate /dev/sdb
– For Volume Groups:
vgdisplay
vgscan
vgextend VGNAME PVNAME
lvextend -L+50G LVNAME
resize2fs LVNAME
LVM :- Logical Volume Manager and it’s a disk Management for Linux/UNIX Systems.
lscpu
Reports info about the cpu and processing units.
lshw
Reports detailed/brief info about multiple hardware units like cpu, memory, disk, network adapters etc.
you can uncompressed zipping files using java, specially “jar” command:
to do that , try the following :
/usr/java6/bin/jar -xvf /tmp/test.zip
if you want to get your operating system relase you have 2 ways to do that:
First: you can run the following command:
# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 13.04 Release: 13.04 Codename: raring
when you login to the system you get a welcome message which contain information about “Last unsuccessful login” , “Last login” and System Information.
if you need to disable this message, just run the following command :
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