Common Linux log files name and usage--reference

In the following example,you can view the content of var/log/cron from line number 101 to 110.M – Starting line numberN – Ending line number<div class="block-panel">
Syntax: sed -n M,Np FILENAME$ sed -n 101,110p /var/log/cron

Example 2: Display first N lines of a file using head commandThis example displays only first 15 lines of /var/log/maillog file. Change 15 to 10 to display the first 10 lines of a log file.?<div class="block-panel">
Syntax:?head -n N FILENAME$ head -n 15 /var/log/maillog

Example 3: Ignore last N lines of a file using head commandThis example shows how to ignore the last N lines,and show only the remaining lines from the top of file. The following example will display all the lines of the /var/log/secure except the last 250 lines.<div class="block-panel">
Syntax:?head -n -N FILENAME$ head -n -250 /var/log/secure

Example 4: Display last N lines of the file using tail commandThis example displays only last 50 lines of /var/log/messages file. Change 50 to 100 to display the last 100 lines of the log file.<div class="block-panel">
Syntax:?tail -n N FILENAME$ tail -n 50 /var/log/messages

Example 5: Ignore first N-1 lines of the file using tail commandThis example shows how to ignore the first N-1 lines and show only the remaining of the lines. The following example ignores the 1st four lines of the /etc/xinetd.conf,which contains only the comments.<div class="block-panel">
Syntax:?tail -n +N FILENAME$ tail -n +5 /etc/xinetd.conf?defaults{instances = 60log_type = SYSLOG authprivlog_on_success = HOST PIDlog_on_failure = HOSTcps = 25 30}includedir /etc/xinetd.d

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