Print column1, column5 and column7 of a data file or output of any columns list awk ‘{print $1, $5, $7}’ data_file cat file_name |awk ‘{print $1 $5 $7}’ ls –al |awk ‘{print $1, $5, $7}’ — Prints file_permissions,size and date List all files names whose file size greater than zero. ls –al |awk ‘$5 > [...]
Archive for the ‘UNIX’ Category
21 May
SMP Symmetric Multiprocessing
SMP (symmetric multiprocessing) is the processing of programs by multiple processors that share a common operating system andmemory. In symmetric (or "tightly coupled") multiprocessing, the processors share memory and the I/O bus or data path. A single copy of the operating system is in charge of all the processors. SMP, also known as a "shared [...]
1 May
Crontab
Setting up cronjobs in Unix and Solaris cron is a unix, solaris utility that allows tasks to be automatically run in the background at regular intervals by the cron daemon. These tasks are often termed as cron jobs in unix , solaris. Crontab (CRON TABle) is a file which contains the schedule of cron entries [...]
30 Apr
AWK Tutorial
COINS.txt gold 1 1986 USA American Eagle gold 1 1908 Austria-Hungary Franz Josef 100 Korona silver 10 1981 USA ingot gold 1 1984 Switzerland ingot gold 1 1979 RSA Krugerrand gold 0.5 1981 RSA Krugerrand gold 0.1 1986 PRC Panda silver 1 1986 USA Liberty dollar gold 0.25 1986 USA Liberty 5-dollar piece silver 0.5 [...]
26 Apr
SSH and SCP
Setting Up Passwordless Connection Secure Copy or SCP is a means of securely transferring computer files between a local and a remote host or between two remote hosts, using the Secure Shell (SSH) protocol. The term SCP can refer to one of two related things, the SCP protocol or the SCP program. *** use password [...]
14 Apr
FIND Command
To look across the /bin and /var/html directory trees for filenames that contain the pattern *.htm*, you can use the following command: find /usr /var/html -name “*.htm*” -print Finding udump directory starting from ORACLE_BASE find $ORACLE_BASE -name “udump” -print Finding Directories To find a list of the directories use can use the -type specifier. find [...]
14 Apr
Korn Shell conditional expressions
A conditional expression is an expression placed between double brackets (‘[[' and ']]’). These expressions are used in conjuction with the test command to test the truth of a comparison. Their use is most beneficial in shell scripts. Word splitting and file name substitution are not performed in the expressions. The table below contains the [...]
